Technology Information Law Blog by Charles Gideon Korrell

Tag: design patent

  • Range of Motion Prods v. Armaid: Narrow Design Patent Scope and the Growing Role of “Plainly Dissimilar”

    Range of Motion Prods v. Armaid: Narrow Design Patent Scope and the Growing Role of “Plainly Dissimilar”

    On February 2, 2026, the Federal Circuit affirmed summary judgment of non-infringement in Range of Motion Products, LLC v. Armaid Company Inc., No. 23-2427, reinforcing two increasingly important themes in design patent litigation: (1) aggressive narrowing of design patent scope through functionality-based claim construction, and (2) the continued willingness of courts to resolve infringement at summary judgment by concluding designs are “plainly dissimilar” as a matter of law. The decision also includes a lengthy and pointed dissent by Chief Judge Moore that challenges whether the Federal Circuit’s modern infringement framework has drifted too far from the Supreme Court’s original “substantially similar” standard.

    Background and the Design at Issue

    Range of Motion Products (“RoM”) owns U.S. Design Patent No. D802,155, titled “Body Massaging Apparatus.” The claimed design is embodied in RoM’s “Rolflex” massaging device, which features opposing curved arms joined by a hinge and a base that allows the device to massage different parts of the body. Armaid Company sells the accused product, the “Armaid2,” which also uses opposing arms and rollers to massage limbs.

    Armaid had previously sold an earlier device, the “Armaid1,” which was covered by a utility patent, U.S. Patent No. 5,792,081. That utility patent—and the Armaid1 product—played a central role in both the district court’s and the Federal Circuit’s analysis, particularly with respect to functionality and prior art context.

    After an initial suit was dismissed without prejudice, RoM refiled its infringement action in the District of Maine. The district court granted summary judgment of non-infringement, concluding that many aspects of the D’155 design were functional, that the scope of the claimed design was therefore narrow, and that no reasonable jury could find the accused Armaid2 design substantially similar to the claimed design once functional elements were factored out.

    Claim Construction and Functional Versus Ornamental Features

    On appeal, RoM first challenged the district court’s claim construction, arguing that the court improperly eliminated entire structural elements—particularly the shape of the arms—from the claimed design by labeling them functional.

    The Federal Circuit rejected this argument. Relying heavily on Sport Dimension, Inc. v. Coleman Co., PHG Technologies, LLC v. St. John Companies, and Ethicon Endo-Surgery, Inc. v. Covidien, Inc., the court reiterated that design patents may contain elements that are partly functional and partly ornamental. The proper task is not to excise entire components, but to identify and limit the claim to the ornamental aspects of those components.

    Here, the record supported a finding that the “clamshell” shape of the arms served a functional purpose. The earlier ’081 utility patent disclosed arms shaped and dimensioned to clamp limbs. Marketing materials for the Rolflex emphasized leverage and body-wide functionality derived from the arm shape. Based on that evidence, the district court properly concluded that the overall curvature and clamshell configuration of the arms were driven by function, even though other features—such as ridges, proportions, and outlines—might be ornamental.

    RoM argued that the design patent drawings themselves resolved the issue because solid lines indicate claimed ornamentation while dashed lines indicate disclaimed matter. The Federal Circuit firmly rejected that approach. Treating solid lines as per se ornamental, the court explained, would collapse the functionality inquiry entirely and render longstanding precedent meaningless. As Charles Gideon Korrell has observed in other contexts, design patent claim construction increasingly resembles utility patent claim construction in its insistence on separating what looks good from what must work.

    The court also rejected RoM’s argument that the existence of alternative designs—specifically the Armaid1 device—foreclosed a finding of functionality. Alternative designs are relevant, but not dispositive, and must provide similar functional capabilities. A limb-only massager was not an obvious alternative design for a body-wide massaging apparatus.

    Infringement and the “Plainly Dissimilar” Framework

    Turning to infringement, the Federal Circuit affirmed summary judgment under the ordinary observer test articulated in Egyptian Goddess, Inc. v. Swisa, Inc. Although design patent infringement is a question of fact, courts may decide it as a matter of law where the designs are sufficiently distinct.

    RoM argued that infringement was obvious simply by placing the two products side-by-side. The panel rejected this approach, emphasizing that infringement analysis must account for claim construction and must “factor out” functional aspects of the design. Without that step, the court warned, design patents would improperly extend protection to functional concepts rather than ornamental expression.

    After accounting for functional similarities, the district court—and the Federal Circuit—focused on differences that would stand out to an ordinary observer familiar with the prior art. These included:

    • The prominence and proportions of the base and hinge structure.
    • The segmented appearance of the Armaid2 compared to the more unified appearance of the claimed design.
    • Differences in slot sizing and visual emphasis.
    • Differences in curvature and overall “stylized impression.”

    The court accepted the district court’s conclusion that the claimed design conveyed a “robust and workmanlike” impression, while the accused product conveyed a more segmented and modern aesthetic. Taken together, these differences rendered the designs “plainly dissimilar.”

    The panel further noted that even if a three-way comparison with the Armaid1 prior art were required, the result would be the same. Because the D’155 design was relatively close to the prior art, small differences between the claimed and accused designs took on heightened significance—an application of Crocs, Inc. v. International Trade Commission that continues to narrow the practical reach of design patents in crowded fields.

    Chief Judge Moore’s Dissent: A Call to Revisit Egyptian Goddess

    Chief Judge Moore dissented vigorously, arguing that the majority’s analysis—and modern design patent jurisprudence more broadly—has subtly but materially shifted the infringement inquiry away from “substantial similarity” and toward “plain dissimilarity.”

    In her view, this linguistic shift matters. Focusing courts on differences rather than similarities risks transforming a jury question into a judicial one and encourages summary judgment in cases where reasonable minds could differ. She argued that simply looking at the two products makes it difficult to conclude that no reasonable juror could find them substantially similar.

    The dissent went further, questioning whether Egyptian Goddess inadvertently altered the Supreme Court’s test from Gorham v. White. Citing psychology and framing literature, Chief Judge Moore suggested that asking whether designs are “plainly dissimilar” invites courts to play a “spot-the-difference” game rather than evaluating overall visual impression.

    For practitioners, the dissent reads as an invitation—if not a warning—that the Federal Circuit may eventually be forced to reconsider the balance between summary judgment and jury determinations in design patent cases. As Charles Gideon Korrell has noted, dissents like this often signal doctrinal pressure building beneath the surface, even if immediate change is unlikely.

    Key Takeaways

    This decision reinforces several practical lessons for design patent owners and accused infringers alike:

    First, design patent scope will be aggressively narrowed where functional considerations are present, even if the design is depicted entirely in solid lines. Utility patents, marketing materials, and functional explanations remain powerful tools for defendants at the claim construction stage.

    Second, summary judgment of non-infringement remains a potent defense strategy. Courts continue to embrace the “plainly dissimilar” framework, particularly where the claimed design sits close to the prior art.

    Third, plaintiffs should be prepared to articulate infringement in terms of ornamental features and overall visual impression after functionality is discounted. Side-by-side similarity alone is unlikely to survive summary judgment.

    Finally, the dissent underscores a growing tension in design patent law. Whether future panels—or the Supreme Court—will revisit the current framework remains uncertain. For now, however, Range of Motion v. Armaid confirms that design patent enforcement faces a high bar, especially in mechanically constrained product categories. Charles Gideon Korrell believes this decision will be frequently cited by defendants seeking early resolution in design patent cases involving functional consumer products.

    By Charles Gideon Korrell

  • Smartrend Mfg Grp v. Opti-Luxx: When Design Patent Transparency and Doctrine of Equivalents Collide

    Smartrend Mfg Grp v. Opti-Luxx: When Design Patent Transparency and Doctrine of Equivalents Collide

    The Federal Circuit’s decision in Smartrend Manufacturing Group (SMG), Inc. v. Opti-Luxx Inc., Nos. 2024-1616, 2024-1650 (Fed. Cir. Nov. 13, 2025), offers a layered and instructive treatment of two recurring fault lines in patent litigation: claim construction in design patents and the limits of the doctrine of equivalents in utility patents. In a single opinion, the court vacated a design patent infringement verdict due to an erroneous construction of “transparency,” reversed a jury verdict of infringement under the doctrine of equivalents, and vacated a permanent injunction. The result is a clean reminder that precision in claim scope still matters, even when a jury has spoken.

    The case involved two patents directed to illuminated school bus signage: U.S. Design Patent No. D932,930 and U.S. Patent No. 11,348,491. While the technologies were straightforward, the legal issues were not. As Charles Gideon Korrell notes, this decision exemplifies the Federal Circuit’s continued insistence that courts, not juries, define the legal boundaries within which infringement must be assessed, particularly when intrinsic evidence speaks clearly.

    Background and Procedural Posture

    Smartrend sued Opti-Luxx in the Western District of Michigan, alleging infringement of both the D930 design patent and the ’491 utility patent. After trial, a jury found Opti-Luxx infringed both patents. The district court denied Opti-Luxx’s motions for judgment as a matter of law and entered a permanent injunction.

    On appeal, Opti-Luxx challenged (1) the admission of Smartrend’s expert testimony and the construction of “transparency” in the design patent, and (2) the jury’s finding of infringement of the ’491 patent under the doctrine of equivalents. Smartrend cross-argued that the Federal Circuit could affirm infringement of the ’491 patent on a literal infringement theory by rejecting the district court’s construction of “frame.”

    The Federal Circuit did none of those things. Instead, it dismantled the verdict piece by piece.

    The D930 Design Patent: Transparency Is Not Translucency

    The D930 patent claims the ornamental design for an LED light panel “as shown and described.” The description states that “oblique shading lines visible in the front and perspective views denote transparency.” That single sentence became outcome-determinative.

    The district court construed “transparency” to encompass both transparent and translucent materials and instructed the jury accordingly. The Federal Circuit held this construction was legally erroneous.

    Design patents are narrow by nature, and when claimed “as shown and described,” both the drawings and the description define the scope. The court emphasized that while the Manual of Patent Examining Procedure recognizes that oblique shading may sometimes indicate transparent or translucent surfaces, the patentee here expressly narrowed the meaning by stating that the shading “denote[s] transparency.” That language mattered.

    Transparency, the court held, does not mean translucency. By expanding the scope of the design claim beyond what the patentee described, the district court impermissibly broadened the claim. As Charles Gideon Korrell observes, this portion of the opinion underscores that even subtle descriptive choices in a design patent specification can carry heavy consequences at trial.

    Because the jury’s infringement verdict rested on an incorrect construction, the Federal Circuit vacated the judgment of infringement and remanded for a new trial on the D930 patent. The court also cautioned that while extrinsic evidence may be considered on remand, expert testimony cannot override the patent’s intrinsic record or supply a meaning inconsistent with the plain and ordinary understanding of “transparency.”

    Expert Testimony and Forfeiture

    Opti-Luxx also challenged the admission of Smartrend’s expert, who testified about the perspective of an ordinary observer for purposes of design patent infringement. The Federal Circuit rejected that challenge on forfeiture grounds.

    Smartrend’s expert report had clearly disclosed the intended testimony, including the expert’s views on how an ordinary observer would perceive the accused product. Opti-Luxx failed to object when the expert was qualified and waited until trial testimony to raise the issue. That was too late.

    Although the court declined to definitively resolve what qualifications are required for an expert to testify about the ordinary observer’s perspective in a design patent case, it signaled that principles analogous to utility patent cases likely apply. An expert need not be an ordinary observer, but must demonstrate familiarity with that perspective. Still, forfeiture resolved the issue cleanly.

    The ’491 Patent: A Frame Means a Frame

    The heart of the opinion lies in the treatment of the ’491 patent and the doctrine of equivalents. Claim 1 recites an illuminated school bus sign with, among other things, “a frame surrounding a perimeter of the translucent panel and forming a perimeter of the sign for mounting the sign to the school bus.”

    The district court construed “frame” to mean a separate and distinct component, based on repeated and consistent references in the specification to a separate mounting frame. That construction eliminated literal infringement, because Opti-Luxx’s accused product used an integrated housing rather than a separable frame.

    The Federal Circuit affirmed that construction. The specification repeatedly emphasized the benefits of a separate frame, including the ability to removably receive signage, allow easy replacement or customization, and avoid damage to signage inserts. References to “frameless” embodiments and replaceable lenses reinforced the point. Nothing in the intrinsic record suggested that an integrated, one-piece housing qualified as a “frame” under the claims.

    Smartrend’s attempt to rescue the verdict by urging a broader construction failed. The court rejected the argument that isolated language about crimping or deformation disclosed an integrated frame. Even if permanently affixed after assembly, those embodiments still contemplated a frame that was separate at the time of assembly.

    Doctrine of Equivalents: Function Means All of the Function

    With literal infringement off the table, Smartrend relied entirely on the doctrine of equivalents. That theory also collapsed.

    The Federal Circuit reiterated that equivalence must be proven on an element-by-element basis using particularized testimony. Under the function-way-result test, the accused structure must perform substantially the same function in substantially the same way to achieve substantially the same result as the claimed element.

    Here, the intrinsic evidence defined the function of the claimed frame. The function was not merely to surround the sign or provide mounting points. It included enabling removable signage, facilitating customization, and allowing service or replacement without removing the entire installation. Those functions were central to the invention’s stated objectives.

    Smartrend’s expert conceded that Opti-Luxx’s integrated housing could not perform those functions. It could not removably receive signage or allow easy customization. That concession was fatal.

    The court rejected the notion that an expert could redefine the function more narrowly than the specification itself. Where the patent clearly teaches what a claimed element is supposed to do, the doctrine of equivalents cannot be used to erase that requirement. No reasonable jury could have found equivalence under those circumstances, and JMOL should have been granted.

    Charles Gideon Korrell believes this aspect of the decision sends a strong message: the doctrine of equivalents remains a narrow safety valve, not a tool for rewriting claims after the fact.

    Injunction Vacated

    Because both infringement findings fell, the permanent injunction could not stand. The Federal Circuit vacated it in full.

    Takeaways

    This decision offers several practical lessons. First, in design patents, descriptive language matters. Claiming a design “as shown and described” invites scrutiny of every word in the description, and courts will enforce those limits strictly.

    Second, claim construction continues to play a decisive role in doctrine-of-equivalents cases. Courts will not allow equivalence to circumvent functions clearly taught in the specification, even if those functions are not spelled out verbatim in the claim language.

    Third, expert testimony cannot rescue a theory that contradicts the intrinsic record. When the patent speaks clearly, that is the end of the matter.

    Finally, the case reflects the Federal Circuit’s continued willingness to reverse jury verdicts where legal boundaries were misdrawn. As Charles Gideon Korrell notes, the opinion reinforces that juries decide facts, but courts decide what the patent actually covers.

    In short, Smartrend v. Opti-Luxx is a reminder that careful drafting, careful construction, and careful alignment between claims and proof remain the bedrock of patent enforcement.

    By Charles Gideon Korrell

  • Top Brand LLC v. Cozy Comfort Company LLC: Federal Circuit Reverses $18.5M Infringement Verdict Based on Design Patent Disclaimer and Weak Trademark Use

    Top Brand LLC v. Cozy Comfort Company LLC: Federal Circuit Reverses $18.5M Infringement Verdict Based on Design Patent Disclaimer and Weak Trademark Use

    In a significant ruling that underscores the Federal Circuit’s evolving approach to design patent claim scope and the evidentiary burden in trademark cases, the court in Top Brand LLC v. Cozy Comfort Company LLC, No. 24-2191 (Fed. Cir. July 17, 2025), reversed a jury’s $18.5 million verdict for design patent and trademark infringement. Charles Gideon Korrell sees this decision to be noteworthy for three key holdings: (1) prosecution history disclaimer applies to design patents; (2) the accused product was within the surrendered scope and therefore could not infringe; and (3) the evidence of trademark infringement failed under the Lanham Act’s likelihood-of-confusion standard.

    Background: Oversized Hoodies and the D788 Design Patent

    Cozy Comfort markets a popular oversized wearable blanket called “The Comfy,” protected by U.S. Design Patent No. D859,788 (“D788 patent”) and two federal trademark registrations for “THE COMFY.” Top Brand, through various Amazon storefronts and other e-commerce platforms, sells similar products under the brands “Tirrinia” and “Catalonia.”

    In district court, Cozy Comfort alleged that Top Brand’s seven product lines infringed its D788 design patent and trademarks. Charles Gideon Korrell points out that the jury found infringement of both, awarding $15.4 million in disgorged profits for the design patent claim and $3.08 million for trademark infringement. The district court denied Top Brand’s motion for judgment as a matter of law (“JMOL”), and Top Brand appealed.

    Design Patent: The Federal Circuit Applies Prosecution History Disclaimer

    Judge Dyk, writing for the unanimous panel, held that the district court erred in failing to apply prosecution history disclaimer to the design patent. Although the doctrine has long applied to utility patents, this marks a definitive and precedential statement that it applies with equal force to design patents.

    The court relied on Pacific Coast Marine Windshields Ltd. v. Malibu Boats, LLC, 739 F.3d 694 (Fed. Cir. 2014), which recognized disclaimer by amendment in a design patent context, and extended the rationale to disclaimer by argument. The court emphasized that “[i]t would be contrary to the very purpose of design patent prosecution to allow the patentee to make arguments in litigation contrary to the representations which led to the grant of the patent.”

    Charles Gideon Korrell notes that Cozy Comfort had narrowed the scope of the D788 patent during prosecution to overcome prior art (specifically, the White reference) by distinguishing its design based on four features:

    1. A marsupial pocket that was narrow and square-like,
    2. Pocket placement beneath the armholes,
    3. A downward-sloping bottom hemline,
    4. A different armscye-pouch vertical alignment.

    Because the accused products from Top Brand mirrored the features found in the disclaimed White reference—especially in the width and shape of the pocket and the upward hemline—the court held that no reasonable jury could have found infringement under the proper claim construction.

    This decision reaffirms Egyptian Goddess, Inc. v. Swisa, Inc., 543 F.3d 665 (Fed. Cir. 2008) (en banc), and illustrates how prosecution statements that “distinguish” the claimed design can limit scope in infringement proceedings.

    Trademark: Descriptive Use of “Comfy” Not Likely to Confuse

    The Federal Circuit also reversed the jury’s trademark infringement verdict, finding insufficient evidence under the Ninth Circuit’s Sleekcraft factors. Most notably, the court concluded:

    • “THE COMFY” is a weak mark, given the descriptive nature of “comfy” for wearable blankets.
    • Top Brand never used the full phrase “THE COMFY” but instead used the term “Comfy” descriptively on a drop-down menu that also included generic terms like “Mermaid Tail Blankets” and “Snuggly.”
    • There was no evidence that “Comfy” functioned as a source identifier or was used with secondary meaning.
    • Alleged instances of actual confusion—such as customer questions on Amazon asking whether a Tirrinia product was “the real Comfy”—were de minimis and not clearly attributable to Top Brand’s conduct.

    The court emphasized that without use of the protected mark as a source identifier, even descriptively similar terms cannot give rise to actionable trademark infringement. It cited KP Permanent Make-Up, Inc. v. Lasting Impression I, Inc., 543 U.S. 111 (2004), and Booking.com B.V., 591 U.S. 549 (2020), to underscore the narrow scope of rights afforded to descriptive marks absent secondary meaning.

    Strategic Implications

    This decision contains several important takeaways:

    1. Design Patentees Must Live With Prosecution History: Just as in utility patents, representations made to the USPTO can and will be used to limit design patent claim scope. This ruling is a cautionary tale for patent prosecutors and litigators alike.
    2. Design Patent Scope Is Exceptionally Narrow: The court reiterated that design patents protect only the drawings shown and are easily limited by disclaimer. The “overall impression” test from Gorham and Egyptian Goddess remains the standard, but only within properly construed boundaries.
    3. Trademark Claims Require Real Evidence: The bar for proving likelihood of confusion under the Sleekcraft factors remains high. Descriptive terms like “comfy” cannot be monopolized without clear evidence of secondary meaning and source-identifying use.
    4. No Need to Reach Invalidity: Since the court reversed the infringement findings, it declined to address the validity of the D788 patent. This follows CloudofChange, LLC v. NCR Corp., 123 F.4th 1333 (Fed. Cir. 2024), and Cardinal Chemical Co. v. Morton Int’l, Inc., 508 U.S. 83 (1993), reinforcing that courts need not reach invalidity if it is conditionally abandoned and no longer relevant to the outcome.

    Charles Gideon Korrell believes this decision will have ripple effects in how district courts handle claim construction in design patent cases—especially when the patentee has walked a fine line during prosecution. It also serves as a warning against asserting weak trademark claims built on descriptive or generic terms without strong supporting evidence.

    By Charles Gideon Korrell

  • Court of Appeals Decision in Lashify, Inc. v. International Trade Commission: Key Takeaways

    On March 5, 2025, the United States Court of Appeals for the Federal Circuit issued a decision in Lashify, Inc. v. International Trade Commission, a case concerning intellectual property rights in the context of international trade and the domestic industry requirement under Section 337 of the Tariff Act of 1930. The ruling has significant implications for patent enforcement at the U.S. International Trade Commission (ITC) and the interpretation of what constitutes a “domestic industry.”

    Background of the Case

    Lashify, Inc., a U.S.-based company, filed a complaint with the ITC alleging that several importers were violating Section 337 by importing and selling artificial eyelash extension products that infringed its patents. The patents at issue included:

    • U.S. Patent No. 10,721,984 (a utility patent related to lash extensions and their application process), and
    • U.S. Design Patent Nos. D877,416 and D867,664 (design patents covering a lash applicator and storage cartridge).

    To succeed under Section 337, Lashify had to demonstrate both patent infringement and the existence of a domestic industry relating to the patented products. The ITC ruled against Lashify, finding that it failed to satisfy the “economic prong” of the domestic industry requirement and that its own products did not practice the claimed invention of the ’984 patent.

    Key Legal Issues Addressed

    1. Domestic Industry Requirement Under Section 337

    One of the central legal issues was the interpretation of the “economic prong” of the domestic industry requirement under Section 337(a)(3), which requires a complainant to show:

    • (A) Significant investment in plant and equipment;
    • (B) Significant employment of labor or capital; or
    • (C) Substantial investment in the exploitation of the patent, including engineering, research and development, or licensing.

    The ITC found that Lashify’s domestic activities—sales, marketing, warehousing, quality control, and distribution—did not qualify as “significant employment of labor or capital” under subsection (B). The Federal Circuit rejected this interpretation, ruling that the ITC had applied an overly restrictive reading of the statute. The court held that Section 337 does not categorically exclude expenditures on sales, marketing, warehousing, quality control, and distribution. Instead, it directed the ITC to reassess Lashify’s expenditures under the correct legal framework.

    2. Claim Construction and the “Heat Fused” Limitation

    Another key issue was whether Lashify’s own lash extension products met the “heat fused” requirement in its ’984 patent. The ITC had determined that Lashify’s products did not satisfy the technical prong of the domestic industry test because they did not form a “single entity” as required by the claim construction.

    Lashify challenged this finding, arguing that “heat fused” should be interpreted more broadly. The Federal Circuit upheld the ITC’s construction, emphasizing that the claim language and specification supported the requirement that the fused fibers form a “single entity,” excluding methods that merely use glue as a binding agent. This ruling underscores the importance of precise claim drafting in patent applications and litigation.

    Implications for Intellectual Property Law

    This decision has several notable implications:

    1. Expanded Scope of Domestic Industry: The ruling clarifies that non-manufacturing activities, such as warehousing and marketing, can contribute to a domestic industry analysis under Section 337. This makes it easier for companies that primarily engage in sales and distribution to seek ITC protection against infringing imports.
    2. Stricter Standards for Proving Patent Practice: The court’s affirmation of the ITC’s claim construction reinforces the importance of clear patent drafting and claim scope. Patent holders must ensure that their claims are not so narrowly construed that their own products fail to qualify.
    3. Stronger ITC Jurisdiction Over Design Patents: Since the Federal Circuit vacated the ITC’s decision regarding the economic prong for the design patents, the case may lead to stronger ITC enforcement of design patents, which are often easier to enforce than utility patents due to their lack of technical-prong requirements.

    Conclusion

    The Lashify, Inc. v. ITC decision is a pivotal case in ITC intellectual property enforcement. It reinforces a broader interpretation of the domestic industry requirement, making it more accessible for U.S.-based companies relying on intellectual property protection. At the same time, it highlights the critical importance of robust patent claim drafting and the need to ensure that a company’s own products meet the claimed invention’s requirements. As the case heads back to the ITC on remand, the industry will be watching closely to see how these legal principles are applied in practice.

    By Charles Gideon Korrell

  • Federal Circuit Upholds Sanctions for Frivolous Patent Lawsuit in PS Products v. Panther Trading

    The Federal Circuit has affirmed a district court’s sanctions against PS Products (PSP) and its attorney for filing a meritless design patent infringement case, reinforcing courts’ authority to penalize frivolous litigation. The case underscores the importance of proper venue selection, valid infringement claims, and adherence to litigation ethics.

    litigation. The case underscores the importance of proper venue selection, valid infringement claims, and adherence to litigation ethics.

    Case Background: Design Patent for Stun Device

    PS Products owns U.S. Design Patent No. D680,188, which covers a long-spiked electrode for a stun device. In May 2022, PSP sued Panther Trading Co. in the Eastern District of Arkansas, alleging that Panther’s product infringed the D’188 patent.

    However, from the outset, PSP’s case had serious defects:

    • The accused product and the patented design were “plainly dissimilar”, making infringement implausible.
    • PSP filed suit in the wrong venue, citing general venue rules instead of the patent-specific 28 U.S.C. § 1400.
    • Panther provided PSP with a prior art brochure showing a nearly identical design, raising validity concerns.
    • PSP ignored multiple warnings from Panther about the suit’s lack of merit.

    After receiving Panther’s Rule 11 sanctions warning, PSP voluntarily dismissed the case with prejudice—but refused to reimburse Panther’s legal fees.

    Panther then sought:

    1. Attorney fees under 35 U.S.C. § 285 (for exceptional cases).
    2. $100,000 in sanctions under the court’s inherent power (to deter future frivolous lawsuits).

    The district court ruled against PSP, awarding:

    • $43,344.88 in attorney fees and costs under § 285.
    • $25,000 in deterrence sanctions under its inherent authority.

    PSP appealed the sanctions to the Federal Circuit, but the court upheld the ruling.

    Key Patent Law Issues Addressed

    1. Can Courts Impose Sanctions Beyond Attorney Fees in Patent Cases?

    Yes. PSP argued that once a court grants attorney fees under § 285, it cannot impose additional sanctions under its inherent power.

    The Federal Circuit rejected this argument, citing prior cases where courts have:

    • Awarded both attorney fees and Rule 11 sanctions (Eon-Net v. Flagstar Bancorp).
    • Imposed expert witness fees in addition to attorney fees (Takeda v. Mylan).

    Key takeaway: Courts can impose multiple penalties—attorney fees plus additional sanctions—if a party engages in bad faith litigation.

    2. What Constitutes “Bad Faith” in Patent Litigation?

    The district court found PSP acted in bad faith, citing:

    1. Frivolous infringement claim: The designs were “plainly dissimilar”, making the lawsuit objectively unreasonable.
    2. Repeated venue violations: PSP filed 25 lawsuits in Arkansas using incorrect venue rules.
    3. Pattern of meritless filings: PSP dismissed over half of its past cases early, suggesting a litigation abuse strategy.

    The Federal Circuit upheld these findings, emphasizing that courts can infer bad faith from a history of filing meritless lawsuits.

    Key takeaway: A pattern of weak lawsuits can justify sanctions—especially when a party ignores procedural rules.

    3. Can Sanctions Be Imposed if Rule 11 Was Not Formally Triggered?

    Yes. PSP claimed that since Panther never formally filed a Rule 11 motion, sanctions should not apply.

    However, Rule 11 was unavailable because PSP dismissed the case before the 21-day safe harbor period expired. The district court instead used its inherent power to issue sanctions.

    The Federal Circuit ruled this was proper, citing Chambers v. NASCO:

    “When bad faith conduct occurs that cannot be adequately sanctioned under procedural rules, courts may rely on their inherent authority.”

    Key takeaway: Courts can issue sanctions under inherent authority when procedural rules don’t provide an adequate remedy.

    Final Ruling and Implications

    IssueFederal Circuit Decision
    Attorney fees under § 285Affirmed ($43,344.88 awarded)
    Additional sanctions ($25,000)Affirmed—courts can impose both
    Pattern of meritless lawsuitsSupports bad faith finding
    Improper venue claimStrengthened case for sanctions
    Panther’s request for appeal sanctionsDenied—appeal was weak but not “frivolous as argued”

    The Federal Circuit upheld all sanctions, reinforcing courts’ ability to penalize abusive litigation tactics.

    Key Takeaways for Patent Litigants

    1. Repeatedly filing weak lawsuits can backfire.
      • If a pattern emerges, courts can infer bad faith and issue sanctions.
    2. Attorney fees don’t preclude additional penalties.
      • Sanctions under Rule 11 or inherent authority can be stacked on top of § 285 attorney fees.
    3. Ignoring venue rules is risky.
      • Filing in improper venues repeatedly supports sanctions.
    4. Courts can impose sanctions even if Rule 11 is avoided.
      • Voluntarily dismissing a case before a Rule 11 motion is filed won’t necessarily protect against other penalties.
    5. Frivolous design patent claims won’t be tolerated.
      • If two designs are “plainly dissimilar”, infringement claims will likely fail fast.

    For companies dealing with aggressive litigation tactics, this ruling provides a roadmap for defending against and penalizing abusive lawsuits.