John P. Hanish, Ph.D., is a Shareholder in Maynard Nexsen’s New York office and a member of the Firm's Intellectual Property Litigation and Intellectual Property Protection practice groups. John started his legal career at Fish & Neave and has 18 years of experience in the trial and appeal of patent licensing and infringement matters in the federal courts, International Trade Commission, and arbitration.

John also practices in the U.S. Patent and Trademark Office with respect to filing petitions and conducting proceedings for post-grant review, inter partes review and the transitional program for covered business method patent review. He also assists clients with patent prosecution and opinions regarding patent infringement and validity.

John's doctorate and research experience help him assist clients with patent issues in the life sciences. John also has extensive experience with medical devices, consumer products, technology, and software patents.

Before he attended law school, John was a Winston Fellow at The Rockefeller University and a Research Scientist at the Sloan-Kettering Institute.

Community & Professional

  • New York Intellectual Property Law Association
  • Federal Circuit Bar Association
  • International Intellectual Property Society
  • Licensing Executives Society
  • Scarsdale Little League
  • Immaculate Heart of Mary Church
  • North Dakota State University Alumni Association


  • Hatch-Waxman pharmaceutical drug product patent litigation
  • Representing pharmaceutical and biotechnology companies in patent licensing negotiations, patent infringement/validity disputes, and counseling regarding biologics and biosimilar drug products
  • Defense of financial services companies against allegations of patent infringement asserted by non-practicing entities



  • State Bar: New York
  • U.S. District Court: New York (Eastern, Southern, Western)
  • U.S. Court of Appeals: First Circuit, Ninth Circuit, Federal Circuit
  • U.S. Supreme Court
  • U.S. Patent & Trademark Office
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