Tag: extrinsic evidence
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Regeneron v. Amgen: Patent Infringement and Biologic Formulations
On March 14, 2025, the United States Court of Appeals for the Federal Circuit issued a decision in Regeneron Pharmaceuticals, Inc. v. Amgen Inc., affirming the district court’s denial of a preliminary injunction sought by Regeneron. This ruling is significant in the realm of the biologic pharmaceutical industry, as it centers on claim construction and…
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Federal Circuit Upholds Narrow Construction of DDR Holdings’ E-Commerce Patent Claims
The Federal Circuit recently handed down a decision in DDR Holdings, LLC v. Priceline.com LLC, affirming a lower court’s interpretation of key claim terms in DDR’s U.S. Patent No. 7,818,399 (“’399 patent”). The ruling highlights the importance of claim construction in patent infringement litigation and underscores how courts evaluate intrinsic and extrinsic evidence in determining…