Paul A. Ainsworth

Hatch-Waxman and Biosimilar Matters

• Nexus Pharmaceuticals, Inc. v. Somerset Therapeutics (D.N.J.) (lead counsel for Somerset in litigation concerning ephedrine sulfate injections—Emerphed®)
• Catalyst Pharmaceuticals and SERB SA v. Hetero Pharmaceuticals; Catalyst Pharmaceuticals and SERB SA v. Lupin Ltd. (D.N.J) (counsel for Catalyst and SERB in litigation concerning amifampridine—Firdapse®)
• Catalyst Pharmaceuticals v. MSN Labs (D.N.J) (counsel for Catalyst and SERB in litigation concerning perampanel—Fycompa®)
• Catalyst Pharmaceuticals and SERB SA v. Jacobus Pharmaceuticals (D.N.J) (counsel for Catalyst and SERB in litigation concerning amifampridine—Firdapse®)
• Genentech, Inc. et al. v. Sandoz, Inc. et al (D.N.J.) (counsel for Sandoz in litigation concerning rituximab)
• Braintree Laboratories v. Lannett Co. (D. Del.) (lead counsel for Lannett Co. in litigation concerning a bowel prep kit—Suprep®.)
• Adapt Pharma Ops.  v. Teva Pharmaceuticals USA (D.N.J.) (counsel for Teva in litigation concerning a treatment for opioid overdose—Narcan®)
• Insys Therapeutics v. Teva Pharmaceuticals USA (D. Del.) (counsel for Teva in litigation concerning a pain management treatment–Subsys®)
• AstraZeneca AB et al. v. Kremers Urban Pharmaceuticals Inc., (D.N.J.) (lead counsel for Kremers Urban in litigation concerning a treatment for gastroesophageal reflux disease–Nexium®)
• Salix Pharmaceuticals, Inc. v. Novel Laboratories, Inc., (D. Del.) (counsel for Novel Laboratories in litigation concerning a treatment for ulcerative colitis—Apriso®)
• IntelGenx Corp. v. Wockhardt Bio, AG, (D.N.J.) (lead counsel for IntelGenx in litigation concerning a treatment for major depression—Forfivo®)
• Helsinn Healthcare S.A. v. Aurobindo Pharma Ltd., (D. Del.) (lead counsel for Aurobindo in litigation concerning an anti-nausea medication—Aloxi®)
• Alcon Pharmaceuticals Ltd. v. Apotex, Inc., (D. Del.) (counsel for Apotex in litigation concerning a treatment for bacterial conjunctivitis–Vigamox®)
• Galderma Laboratories Inc. et al v. Amneal Pharmaceuticals, LLC et al., (D. Del.) (counsel for Amneal in litigation concerning a treatment for rosacea–Oracea®)
• Medeva Pharma Suisse A.G. et al v. Roxane Laboratories, Inc., (D.N.J.); Medeva Pharma Suisse A.G. et al. v. Par Pharmaceuticals et al. (D.N.J.) (counsel for patentee and licensee in a multi-case litigation concerning a treatment for ulcerative colitis–Asacol®)
• Shire LLC v. Watson Laboratories, Inc., (S.D.N.Y)(S.D. Fla.) (counsel for patentee litigation concerning a treatment for attention deficit hyperactivity disorder – Adderall XR®)

ITC

• In re Certain High-Performance Gravity-Fed Water Filters and Products Containing the Same, 337-TA-1294 (lead counsel for Complainant Brita in an ITC Investigation pertaining to pour-through water filters)
• In re Certain Electronic Nicotine Delivery Systems and Components Thereof, 337-TA-1139 (counsel for Complainant Juul Labs, Inc. in an ITC Investigation pertaining to electronic nicotine delivery systems)
• In re Certain Electronic Nicotine Delivery Systems and Components Thereof, 337-TA-1141 (counsel for Complainant Juul Labs, Inc. in an ITC Investigation pertaining to electronic nicotine delivery systems)
• In re Certain Road Construction Machines and Components Thereof, ITC Investigation No. 337-TA-1088 (counsel for Respondents Wirtgen GmbH, Wirtgen America, and Joseph Vögele AG in an ITC investigation pertaining to road construction equipment)
• In re Certain Road Milling Machines and Components Thereof, ITC Investigation No. 337-TA-1067 (counsel for Complainant Wirtgen American in an ITC investigation pertaining to road construction equipment)
• In re Lithium Silicate Materials and Products Containing the Same, ITC Investigation No. 337-TA-911 (counsel for Complainant Ivoclar Vivadent AG in an ITC investigation pertaining to lithium silicate-based dental prostheses)
• In re Certain Motorized Self-Balancing Vehicles, ITC Investigation No. 337-TA-1000 (counsel for Respondent Powerboard in an ITC investigation pertaining to personal transport vehicles)
• In re Certain Overflow and Drain Assemblies for Bathtubs and Components Thereof, ITC Investigation No. 337-TA-993 (counsel for Complainant WCM Industries in an ITC investigation pertaining to screwless bathtub drain assemblies)
• In re Certain Video Game Machines and Related Three-Dimensional Pointing Devices, ITC Investigation No 337-TA-658 (counsel for respondent Nintendo in an ITC investigation concerning television interactive program guide and 3D pointing device technologies)

Trade Secrets

• Pharmazam, LLC v. Thermo Fisher Scientific, Inc. (M.D. Fla.) – Represented Thermo Fisher Scientific in an allegations relating to trade secret misappropriation. Plaintiff voluntarily dismissed complaint after Sterne Kessler filed a motion to dismiss for failure to state a claim.
• Sonatype, Inc. Takari, Inc. (D. Md.) – Filed a complaint alleging that the company’s founder misappropriated, copied, and wrongfully disclosed Sonatype’s intellectual property and trade secrets after separating from the company. Sterne Kessler achieved a favorable settlement shortly after filing the complaint.
• Confidential matter. Represented a pharmaceutical company in a trade secret dispute related to the misappropriation of trade secret information involving a former business development partner. Former development partner used confidential business information in an effort to extort a license to certain intellectual property. Conducted an internal investigation that led to evidence of misappropriation. Negotiated a favorable resolution for our client.
• Confidential matter. Represented a biotechnology client in a dispute with a former founder and chief scientific officer. Conducted an internal investigation that led to evidence of breaches of the former founder’s employment and separation agreements.  Negotiated a favorable resolution for our client.

Other

• Wirtgen America v. Caterpillar (Del.) (counsel for Wirtgen America in litigation concerning road milling machines)
• University of California v. Broad Institute (PTAB) (counsel for The Regents of the University of California, University of Vienna, and Emmanuelle Charpentier in an interference proceeding relating to CRISPR technology)
• Julbo, Inc. v. Oakley, Inc. (N.D. Cal.) (lead counsel for Oakley in litigation concerning goggles)
• The Kingsford Charcoal Co. v. Creative Spark (PTAB) (counsel for petitioner in proceeding challenging the patentability of a patent pertaining to charcoal briquets)
• KAZ USA, Inc. v. Brita LP, (PTAB) (counsel for patent owner in proceeding challenging the patentability of a patent pertaining to water filters)
• 1-800-CONTACTS, d/b/a/ glasses.com v. DITTO Technologies, Inc. (D. Utah) (lead counsel for plaintiff glasses.com in litigation relating to systems for virtual display and modeling of eyewear)
• Naraka Intellectual Property LLC v. Atlassian, Inc. (M.D. Pa.) (lead counsel for defendant in litigation relating to videoconferencing systems)
• Ivoclar AG v. Glidewell Laboratories, (D. N.J.) (counsel for Ivoclar in litigation pertaining to lithium-silicate dental prostheses)
• Intellectual Ventures v. Ericsson (Fed. Cir.) (appellate counsel for patent owner in appeal from an inter partes review relating to wireless communications systems)
• Butamax Advanced Biofuels LLC v. Gevo, Inc., (PTAB) (counsel for petitioner in proceeding challenging the patentability of certain biofuel manufacturing patents)
• Automated Tracking Solutions, LLC v. Awarepoint Corp., (E.D. Va.); Automated Tracking Solutions, LLC v. Teletracking Technologies, Inc. et al. (E.D. Va.) (counsel for patentee in multi-case litigation relating to radio frequency identification (RFID) technology)

• Best Lawyers, “The Best Lawyers in America®” (2025 – 2023)
• World Intellectual Property Review (WIPR), “WIPR Leaders” (2024 – 2023)
• Super Lawyers, “Super Lawyer – Washington, DC” (2021 – 2017)
• Super Lawyers, “Rising Star – Washington, DC” (2014)

• J.D., William & Mary Law School
• B.A., Political Science, The George Washington University

• District of Columbia
• Maryland
• West Virginia
• U.S. District Court for the District of Maryland
• U.S. District Court for the District of Columbia
• U.S. District Court for the Eastern District of Michigan
• U.S. District Court for the Southern District of West Virginia
• U.S. Court of Appeals for the Federal Circuit

• U.S. District Court for the District of Delaware