Ian Dee

Ian Dee

Partner - Patent Attorney

A highly respected attorney, Ian’s practice includes drafting, prosecuting and litigating patents relating to chemical, pharmaceutical and medical device technologies.

Ian has considerable international experience, having been involved in patent prosecution and patent litigation in many countries around the world. Ian also has over 25 years’ experience in opposition and appeal proceedings before the Opposition Divisions and Boards of Appeal of the European Patent Office, having personally handled more than 150 cases.

Prior to joining Potter Clarkson in 1997, Ian began his career in research for a large multinational chemical corporation, before moving into its patents department where he handled a wide range of chemical and engineering subject matters.

Ian became a partner in 1999.



Opposition and appeal proceedings, patent litigation


Ian read chemistry at the University of Leicester.


BSc (Hons), UK and European Patent Attorney

Awards & Recognition

IAM Patent 1000 - Prosecution 2017-2022


Golf, gardening, rugby (as a spectator), walking




Dee has wrapped up more than 150 EPO hearings during his tenure and brings research experience at a chemical multinational to his broad practice." IAM Patent 1000: The World’s Leading Patent Professionals, 2021
Dee boasts valuable in-house insight, having started his career in a large multinational chemical corporation." IAM Patent 1000: The World’s Leading Patent Professionals, 2020
They give sound advise from a legal perspective but they also consider the commercial aspects on projects which makes them stand out from other competitors. Mark Snelgrove, Simon Curtis, Ian Dee, Rob Pugh do an excellent job on patent litigation." Legal 500, 2020