Denis V. Keseris

Denis Keseris is a partner at Bereskin & Parr LLP, and a member of the Electrical & Computer Technology practice group. His practice covers all aspects of patents, particularly strategic patent procurement in the fields of optical communication technology, artificial intelligence, fintech and medical devices.

Denis has over 15 years of IP experience in Europe and North America. Prior to relocating to Canada in 2017, Denis was a partner at one of the U.K.'s leading intellectual property firms. His practice focused on helping clients develop and manage commercially useful patent portfolios in the fields of optical communication technology, artificial intelligence and cleantech, as well as advising clients on contentious matters and the commercialization of medical devices and computer-implemented inventions. Denis also practiced at two other prominent IP law firms in the U.K. and France, as well as in-house counsel at a well-known technology company, where he was responsible for growing the European optical technologies patent portfolio. 

Before entering private practice, Denis was a member of the examination branches of both the Canadian Intellectual Property Office and the U.K. Intellectual Property Office.

Denis is a fellow of the Chartered Institute of British Patent Attorneys and is qualified as a European Patent Attorney. He received a Postgraduate Certificate in Intellectual Property Law from the University of London’s Queen Mary School of Law. Denis completed his B.A.Sc. in Electrical, Electronics & Communications Engineering at the University of Ottawa.