Walter B. Welsh, Esq.

Walter B. Welsh is the owner of the Welsh IP Law firm. He is a veteran patent and trademark attorney with twenty years of career experience as a practicing lawyer and mechanical engineer.

His passion is increasing business value through strategic patent and trademark protection. An engineer by trade, he has developed a global intellectual property practice and a strong reputation as an expert in patent and trademark law. He focuses on developing and growing intellectual property portfolios that resonate with corporate objectives and amplify market positions. His clients include Fortune 500 companies, global brands, family businesses, and start-ups. He works hard to achieve client goals at the USPTO and in the Federal Courts and he is known for aggressively protecting his clients’ intellectual property.

Walter lives with his family in Darien, Connecticut.  He is an avid skier and cyclist.  You can connect with him on LinkedIn.

Bar Admissions

  • State of Connecticut
  • State of New York
  • District of Connecticut
  • Unites States Patent and Trademark Office, Reg. No. 64,424
  • Southern District of New York
  • Eastern District of New York
  • Court of International Claims
  • Court of Appeals for the Federal Circuit


  • University of Connecticut School of Law, Juris Doctor
  • Tufts University, Bachelor of Science Mechanical Engineering

Contact Welsh IP Law

Please contact us for a courtesy consultation and estimate regarding your intellectual property.

PO Box 1267 Darien, CT 06820

We specialize in prosecution and litigation

Our clients include Fortune 500 companies, global brands, family businesses, and start-ups from around the world.