Thomas F. Brennan


  • William Mitchell College of Law - JD 1994
  • Southern Methodist University - MS Computer Engineering 1987
  • University of Wisconsin - BS Electrical Engineering 1984

Bar Admissions

  • State of Minnesota
  • United States Patent and Trademark Office


  • American Intellectual Property Law Association (AIPLA)
  • Minnesota Intellectual Property Law Association (MIPLA)
  • Intellectual Property Owners (IPO) Association
  • American Bar Association (ABA)
  • Institute of Electrical and Electronics Engineers (IEEE)
  • Association for Computing Machinery (ACM)

Thomas F. Brennan

Senior Counsel

Technology Areas

  • Software
  • Medical Devices
  • Electrical

Professional Experience

Thomas F. Brennan is a Senior Counsel of Shumaker & Sieffert.  He is a registered patent attorney with nearly 25 years of patent practice experience and ten years of industry experience as a computer systems engineer. Tom has particular technical expertise in the fields of computer hardware, software and image/signal processing. Tom focuses on patent preparation/prosecution, patent infringement/validity analysis, and patent portfolio engineering.

Previously, Tom was a Shareholder at Schwegman, Lundberg & Woessner and an Associate at Merchant & Gould.  Tom also worked an Engineer at GE Medical Systems, E-Systems and Sperry Univac (now Unisys).