transitive verb
:to make changes: do something in a new way
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Patrick E. Brennan

Patrick Brennan is a member of the firm’s Intellectual Property Group counseling clients, from universities to small startups to Fortune 500 companies.

Registered to practice before the U.S. Patent and Trademark Office, Patrick actively engages in the preparation, prosecution and enforcement of U.S. and foreign patents, most often in the mechanical arts. For example, he has extensive experience in a wide range of absorbent products, baby care products, nursing products, recreational products, processing and manufacturing equipment, pest control devices and medical apparatus. Within this array of technologies, Patrick gets to see innovation in action as he guides clients through the patenting process.

Patrick defends clients' patents and challenges competitors' patents at the U.S. Patent and Trademark Office in ex parte and inter partes re-examination proceedings as well as inter partes Review proceedings. He also provides advice concerning freedom-to-operate where he gives ideas for progressing or alternatives to mitigate client risk.


Prior to law school, Patrick was an environmental engineer for an international engineering consulting firm. As a former registered professional geologist and professional engineer, he assisted clients in remediating groundwater and soil contamination, as well as reporting to state and federal regulatory agencies.