John Callahan is a partner in Sughrue's Washington, DC office. His practice includes all aspects of Intellectual Property law, with a particular focus on district court litigation and post-grant proceedings before the Patent Trial and Appeal Board of the U.S. Patent and Trademark Office. In addition to his litigation and practice before the PTAB, Mr. Callahan counsels a variety of international and domestic clients regarding U.S. IP law, including providing clearance, enforceability and validity opinions. He also counsels clients on licensing matters and assists clients in the procurement of both U.S. and foreign patents. Mr. Callahan’s experience also includes the specialized U.S. practice of inter partes review, post-grant review, ex parte reexamination and reissue.
Mr. Callahan’s practice has encompassed a wide range of technologies in the chemical, biotechnology, mechanical and electrical arts, including pharmaceuticals, batteries, food chemistry, medical devices, polymers, catalysts, glass products, semiconductor devices and electronic circuitry. Mr. Callahan has lectured widely on U.S. IP law, particularly on the USPTO's post grant procedures implemented pursuant to the America Invents Act. He has lectured in the United States, Europe, Korea, Japan, India and China on topics including strategies relating to post-grant proceedings at the USPTO, what constitutes prior art under the America Invents Act, opinion writing, generic drug litigation, case law from the U.S. Court of Appeals for the Federal Circuit, claim drafting for biotech inventions, reexamination, interferences, the doctrine of equivalents and changes in U.S. patent laws and procedures. A recent presentation on IPR proceedings entitled "PTAB: Success by the Numbers" can be viewed on YouTube at the URL address: https://www.youtube.com/watch?v=jv6PMNJA8vE.
- Recognized among Managing Intellectual Property's IP Stars USA, 2017 for expertise in patent prosecution and litigation