About David R Marsh

David R Marsh is a partner at Arnold & Porter. He focuses extensively on IP counselling, patent prosecution, interferences, inter partes and ex parte matters, Hatch-Waxman issues, and patent procurement in the biotechnology, business methods, chemical, clothing, computer media, consumer products, pharmaceuticals, and medical device areas. David’s experience includes lead counsel for numerous post-allowance proceedings at the US Patent and Trademark Office, appeal counsel at the US Patent and Trademark Office Board of Patent Appeals and Interferences, and lead co-ordinating counsel for multiple European opposition proceedings and other worldwide dispute resolution proceedings – as well as worldwide patent prosecution, non-infringement and invalidity analysis, and multiple due diligences.