John P. Guenther

John P. Guenther

Troy, MI recognized lawyers icon Recognized in Best Lawyers since 2016
Fishman Stewart PLLC

6 Best Lawyers awards

Fishman Stewart PLLC logo

Awarded Practice Areas

Litigation - Intellectual Property Patent Law Trademark Law

Biography

John’s practice encompasses all aspects of intellectual property law, including domestic and international patent acquisition and maintenance, trademark and copyright registration; intellectual property enforcement and litigation; trade secret protection; high-profile product and trademark clearances; large scale due diligence efforts; joint venture and commercial agreements; and licensing. In his practice, he counsels and represents a number of Fortune 500 companies, as well as a number of mid-size and start-up organizations, and universities. He has significant experience in the automotive, plastics, aerospace, health system, medical device, advertising, and telematics fields/industries.
John is registered to practice before the United States Patent and Trademark Office (USPTO). He has been admitted to practice in the U.S. district courts in several states, the U.S. Court of Appeals for the Federal Circuit, and the Supreme Court of the United States. He is also a longtime member of the Licensing Executive Society (LES).
From 1993-1999, John Guenther served as in-house legal counsel and Director of Intellectual Property for a prominent plastics company with both domestic and international operations. His years of in-house experience provides him with unique insight and expertise in connection with intellectual property and practical business considerations.
Fishman Stewart PLLC

6 Best Lawyers awards

Fishman Stewart PLLC logo

Overview

  • University of Detroit Mercy, J.D., graduated 1993

  • Michigan, State Bar of Michigan

  • American Intellectual Property Law Association - Member
  • Federal Bar Association - Member
  • Licensing Executives Society - Member
  • Michigan Intellectual Property Law Association - Member
  • Oakland County Bar Association - Member
  • State Bar of Michigan - Member

  • U.S. District Court, Eastern District of Michigan
  • U.S. District Court, Western District of Michigan
  • U.S. Supreme Court
  • U.S. Court of Appeals, Federal Circuit
  • U.S. Patent and Trademark Office
  • Michigan, State Bar of Michigan
  • American Intellectual Property Law Association - Member
  • Federal Bar Association - Member
  • Licensing Executives Society - Member
  • Michigan Intellectual Property Law Association - Member
  • Oakland County Bar Association - Member
  • State Bar of Michigan - Member
  • University of Detroit Mercy, J.D., graduated 1993
  • U.S. District Court, Eastern District of Michigan
  • U.S. District Court, Western District of Michigan
  • U.S. Supreme Court
  • U.S. Court of Appeals, Federal Circuit
  • U.S. Patent and Trademark Office

Client Testimonials

The patent attorneys at Dykema, and John Guenther in particular, have a unique understanding of our business and tailor their services to enhance our IP portfolio. John is extremely helpful and responsive to our requests.

John's patent expertise is top-notch and he is very good at responding quickly to our needs. Also, his knowledge of our business and industry makes patent drafting that much more effective. We really enjoy working with John.

Mario Tabone (Plastipak Packaging, Inc.)

Plymouth, MI

Awards & Focus

Recognized in The Best Lawyers in America® 2026 for work in:
  • Litigation - Intellectual Property
  • Patent Law
  • Trademark Law
Additional Areas of Practice:
  • Copyright Law
  • Litigation - Patent
  • Trade Secrets Law
Special Focus:
  • Intellectual Property
  • Technology
Awards:
  • AV® Preeminent Lawyer – Peer Review Rating of 5.0 out of 5.0 (Martindale-Hubbell)
  • Best Lawyers® – Patent and Trademark Law, 2016-Present
  • IP Stars® – Patent Star and Trademark Star
  • Dbusiness Top Lawyers

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