About David R. Marsh

David R. Marsh is a partner in the firm. He focuses extensively on intellectual property counselling, patent prosecution, interferences, inter partes and ex parte matters, Hatch-Waxman issues and patent procurement, including in the biotechnology, business methods, chemical, clothing, computer media, consumer products, pharmaceutical, and medical device areas. His experience includes lead counsel for numerous post-allowance proceedings at the US Patent and Trademark Office such as re-examination, reissues, inter partes reviews and interferences, appeal counsel at the US Patent and Trademark Office Board of Patent Appeals and Interferences, lead co-ordinating counsel for multiple European Opposition proceedings and other worldwide dispute resolution proceedings, worldwide patent prosecution experience, non-infringement and invalidity analysis and multiple due diligences.


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