Practice Focus

Education

  • The Ohio State University College of Law, J.D., cum laude, 1977
  • University of Cincinnati, B.S. in Chemistry, cum laude, 1974

Admissions

  • States of Ohio and California
  • U.S. Patent and Trademark Office
  • U.S. Court of Appeals for the Federal District
  • U.S. Supreme Court

John T. Wiedemann

Partner

JOHN’S primary focus is intellectual property and technology law. He regularly appears in federal and state courts on behalf of clients involved in intellectual property litigation, including patent jury trials. He also handles the preparation and prosecution of U.S. and foreign trademark and chemical and biotech-related patent applications for a wide range of domestic clients. He advises clients on matters of patent and trademark validity and renders opinions relating to infringement and right to use studies. John provides counsel regarding the protection and transfer of technology, licensing and joint venture agreements, trade secrets, and unfair competition concerns.

John is a member and former director of the American Intellectual Property Law Association (AIPLA). He has chaired AIPLA’s Patent Law, Licensing, Trade Secret, and Public Information Committees and is currently an AIPLA Fellow. He was named one of the state’s top patent lawyers in a poll taken by California Lawyer, and has been listed as one of The Best Lawyers in America in the area of biotechnology law since 2008. John has written and lectured on a wide variety of patent law and related litigation issues and is an active member of the California and Ohio State Bar Associations.

Prior to earning his bachelor of science degree, John studied at the United States Air Force Academy. He was an associate with the law firm of Lyon & Lyon before acting as patents and licensing counsel for TRW Inc. where he was responsible for its Energy Division. John was a partner at Pretty, Schroeder, Brueggermann & Clark before beginning his tenure with Calfee as a partner in 1994.