David J. Connaughton

David Connaughton's practice involves all aspects of intellectual property law including patents, trademarks, and copyrights, with a focus on patent application preparation and prosecution, and litigation matters. David has developed a reputation as an aggressive advocate for his clients, particularly in matters before the Federal Court and the Patent Trial and Appeal Board (PTAB). David's expertise is sought out nationwide by both clients as well as other attorneys for the complex and nuanced arguments required in matters such as appeals, inter partes review, and litigation, among others.

David holds a Bachelor of Science degree in Chemical Engineering with a focus in Bioengineering and has been with Lambert Shortell & Connaughton since 2011. As an attorney registered to practice before the US Patent and Trademark Office, he has experience in all aspects of patent practice including patent application preparation and prosecution, among others.

David has prosecuted and obtained over six hundred (600) U.S. patents for clients in a wide variety of technological fields including mechanical, electrical, software, biotechnology, energy, and environmental innovations. David has also obtained patent registrations in numerous countries outside of the United States, in conjunction with foreign associates.

In addition to patent prosecution, David has been lead or assistant counsel on numerous patent litigations in the Federal Courts, particularly focusing on claim construction matters, infringement/non-infringement assertions, and validity/invalidity assertions. Further, David advises clients on all aspects of management, enforcement, and licensing of their patent portfolios.

David also has substantial experience in post grant proceedings before the US Patent Office's Patent Trial and Appeal Board (PTAB), particularly inter partes review (IPR), post grant review (PGR), and ex parte reexamination to address the validity or invalidity of patents after they have issued. Through such proceedings, David has helped strategically and effectively invalidate and/or weaken the patent positions of opposing parties or to defend the patent validity positions of our clients.

Outside of the office, David enjoys hiking and being outdoors, as well as spending time with his wife and two sons. David recently summited Mt. Rainier in Washington after a two day climb. When he can, David enjoys working at craft beer festivals across the country pouring beer for a Portland, Maine brewery started by his cousin.