Explore 27 court opinions on Doctrine Of Equivalents. AI-powered plain English summaries, key holdings, and legal analysis.
27 recent cases analyzed in this topic area.
Third Circuit: Biosimilar Renflexis Does Not Infringe Remicade Patents
Johnson & Johnson v. Samsung Bioepis Co Ltd, decided by Third Circuit on April 14, 2026, resulted in a defendant win outcome. The Third Circuit affirmed the District Court's grant of summary judgment ...
Appellate court affirms patent infringement ruling and royalty award
Radial Power Asset, LLC v. UNIRAC,Inc, decided by Texas Court of Appeals on April 9, 2026, resulted in a plaintiff win outcome. The dispute centered on whether Radial Power Asset, LLC (Radial) owed UN...
Federal Circuit Affirms No Patent Infringement Under Doctrine of Equivalents
This case involves a dispute over a patent for a "method and apparatus for detecting and measuring the concentration of analytes in a fluid sample." The inventor, Dr. Kendall, sued Collins, alleging t...
Federal Circuit Finds No Patent Infringement Under Doctrine of Equivalents
This case involves a dispute over a patent for a "method and apparatus for detecting and characterizing subsurface anomalies." The inventor, Mr. MacKey, sued Collins, alleging that Collins infringed o...
Appeals Court Affirms Non-Infringement Ruling in Patent Dispute Over Dwarfism Drug
This case involves a patent dispute between Ascendis Pharma A/S and Biomarin Pharmaceutical Inc. regarding a drug used to treat achondroplasia, a form of dwarfism. Ascendis sued Biomarin, alleging tha...
Sixth Circuit Affirms Summary Judgment in Patent Case Over "Substantially Flat" Surface
Eaton Corp. v. Angstrom Auto. Group, LLC, decided by Sixth Circuit on February 13, 2026, resulted in a defendant win outcome. The Sixth Circuit affirmed the district court's grant of summary judgment ...
Federal Circuit Affirms Non-Infringement of Catalyst Patent
Ingevity Corporation v. Basf Corporation, decided by Federal Circuit on February 11, 2026, resulted in a defendant win outcome. The core dispute centered on whether BASF's patent for a catalyst used i...
Fifth Circuit Affirms Summary Judgment in Patent Infringement Case
Pharm Research and Mfr v. Murrill, decided by Fifth Circuit on February 9, 2026, resulted in a defendant win outcome. The Fifth Circuit affirmed the district court's grant of summary judgment to the d...
First Circuit: 'Operation' game doesn't infringe toy surgery kit patent
DeAngelis v. Hasbro, Inc., decided by First Circuit on January 29, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's dismissal of a lawsuit alleging that Hasbr...
Federal Circuit Affirms No Patent Infringement for Unapproved Drug Method
Barry v. Depuy Synthes Companies, decided by Federal Circuit on January 20, 2026, resulted in a defendant win outcome. The Federal Circuit affirmed the district court's grant of summary judgment to th...
Ninth Circuit: Garbage Disposal Patent Not Infringed Under Doctrine of Equivalents
Insinkerator, LLC v. Joneca Company, LLC, decided by Ninth Circuit on December 29, 2025, resulted in a defendant win outcome. The Ninth Circuit affirmed the district court's grant of summary judgment ...
Federal Circuit Affirms Non-Infringement of Infant Car Seat Patent
Wonderland Switzerland Ag v. Evenflo Company, Inc., decided by Federal Circuit on December 17, 2025, resulted in a defendant win outcome. The core dispute centered on whether Evenflo's "Prodigy" infan...
CAFC Affirms Zillow's Non-Infringement of IBM Patent
IBM v. Zillow Group, Inc., decided by Federal Circuit on December 9, 2025, resulted in a defendant win outcome. The Federal Circuit affirmed the district court's grant of summary judgment to Zillow, h...
Federal Circuit Affirms No Patent Infringement by Goodyear
Coda Development S.R.O. v. Goodyear Tire & Rubber Company, decided by Federal Circuit on December 8, 2025, resulted in a defendant win outcome. The Federal Circuit affirmed the district court's grant ...
Court Rules Apple Did Not Infringe on iPhone Patent
Apple-Chamberlain v. Apple, decided by Ohio Court of Appeals on December 2, 2025, resulted in a defendant win outcome. The plaintiff, Apple-Chamberlain, sued Apple Inc. for alleged patent infringement...
Federal Circuit Affirms Non-Infringement of Gesture Interface Patent
In Re GESTURE TECHNOLOGY PARTNERS, LLC, decided by Federal Circuit on December 1, 2025, resulted in a defendant win outcome. The case concerns whether a patent for a gesture-based user interface was i...
Federal Circuit Affirms Non-Infringement of Smart Lighting Patent
Smartrend Manufacturing Group (Smg), Inc. v. Opti-Luxx Inc., decided by Federal Circuit on November 13, 2025, resulted in a defendant win outcome. The core dispute centered on whether Opti-Luxx's "sma...
CAFC Affirms Non-Infringement Finding in Patent Dispute
Canatex Completion Solutions, Inc. v. Wellmatics, LLC, decided by Federal Circuit on November 12, 2025, resulted in a defendant win outcome. The case concerns a patent infringement dispute where the p...
Federal Circuit Affirms Non-Infringement of Aortic Valve Patent
Aortic Innovations LLC v. Edwards Lifesciences Corporation, decided by Federal Circuit on October 27, 2025, resulted in a defendant win outcome. The core dispute centered on whether Edwards Lifescienc...
Ninth Circuit Invalidates Software Patent as Abstract Idea
Supertech, Inc. v. My Choice Software, LLC, decided by Ninth Circuit on October 23, 2025, resulted in a defendant win outcome. The Ninth Circuit affirmed the district court's grant of summary judgment...
Federal Circuit Affirms Patent Infringement Finding Against Palo Alto Networks
Centripetal Networks, LLC v. Palo Alto Networks, Inc., decided by Federal Circuit on October 22, 2025, resulted in a plaintiff win outcome. The core dispute involved Centripetal Networks' patent infri...
CAFC Affirms ITC Decision on Brita Water Filter Patent Infringement
Brita Lp v. Itc, decided by Federal Circuit on October 15, 2025, resulted in a defendant win outcome. The case concerns whether the International Trade Commission (ITC) correctly determined that Brita...
Federal Circuit Affirms Non-Infringement of Lens Manufacturing Patent
Inland Diamond Products Co. v. Cherry Optical Inc., decided by Federal Circuit on October 15, 2025, resulted in a defendant win outcome. The case concerns whether a patent for a "method of manufacturi...
Federal Circuit Affirms Non-Infringement of Semiconductor Manufacturing Patent
Iqe Plc v. Newport Fab, LLC, decided by Federal Circuit on October 15, 2025, resulted in a defendant win outcome. The case concerns whether a patent for a "method of manufacturing a semiconductor devi...
Federal Circuit Affirms ITC's Negative Dumping Determination for Gujarat Fluorochemicals
Gujarat Fluorochemicals Ltd. v. United States, decided by Federal Circuit on October 8, 2025, resulted in a defendant win outcome. The Federal Circuit affirmed the International Trade Commission's (IT...
Federal Circuit Affirms Non-Infringement of Wireless Patent
Finesse Wireless LLC v. At&t Mobility LLC, decided by Federal Circuit on September 24, 2025, resulted in a defendant win outcome. The core dispute centered on whether At&t Mobility LLC (At&t) infringe...
Federal Circuit Denies Standing for Patent Infringement Claim
Future Link Systems, LLC v. Realtek Semiconductor Corporation, decided by Federal Circuit on September 9, 2025, resulted in a defendant win outcome. The case concerns whether Future Link Systems (FLS)...