Matthew Gearin is an associate in the firm’s Intellectual Property, Trademark Services and Litigation practices. His main focus includes domestic and foreign trademark portfolio management.

Along with assisting clients in a variety of industries on trademark selection, Matthew provides a full range of trademark services on a global scale, including clearance searches, registration and prosecution, opposition and cancellation, and trademark-related litigation. He also represents clients by drafting agreements related to trademark licensing and the coexistence of intellectual property rights. Moreover, Matthew assists clients through all stages of patent prosecution, including patentability searches, patent applications and answering office actions from the U.S. Patent and Trademark Office.

In addition to providing Intellectual Property services, Matthew works with Armstrong Teasdale’s  health care litigators in representing clients in all types of medical malpractice, professional liability, breach of contract and other health care claims.


  • Saint Louis University School of Law  (J.D.)
  • Southern Illinois University-Edwardsville  (B.S.)
    • Biology: Medical Sciences


  • Missouri


Prior to joining the firm as an attorney, Matthew was a patent scientist in the firm’s Intellectual Property practice group. Before that, Matthew worked as a technician and data analyst at an agrochemical and agricultural biotechnology company where he performed genetic testing of corn, soy, and various other vegetables, collecting and interpreting large amounts of genetic data, and communicating with in-house customers regarding seed quality data.