Cassan Maclean
Intellectual Property | Barristers, solicitors, patent and trademark agents

J. David Barrans

J.David Barrans  |  Tel: 613-238-6404 x. 227


Dr. David Barrans is a REGISTERED patent agent.

David completed his Ph.D. in molecular cardiology/cardiovascular genomics, after earning a Master of Health Science in Clinical Biochemistry, and a B.Sc. in Biochemistry, all from the University of Toronto. David also served as a Research Fellow in Cardiology at Harvard Medical School.

David has practiced for several years in intellectual property at two national Canadian law firms; he is a registered Canadian patent agent before the Canadian Intellectual Property Office (CIPO), and can represent Canadian patent applicants in the USPTO.  David's practice is focused on the drafting and prosecution of patent applications in diverse areas of technology, particularly in biotechnology, life sciences and biochemistry. He has experience in advising and assisting clients with worldwide patent portfolio management and filing strategies, and has given presentations on the patenting process.

David regularly attends the annual Biotechnology Innovation Organization (BIO) International Convention.  He also enjoys giving presentations on the patenting process and has spoken to audiences in the academic setting.


  • University of Toronto, Ph.D. (Laboratory Medicine and Pathobiology), 2002
  • University of Toronto, M.H.Sc. (Clinical Biochemistry), 1996
  • University of Toronto, B.Sc. (Biochemistry), 1994
  • CIPO - Canadian patent agent (2005)
  • USPTO - patent agent for Canadian applicants (2006)


  • Intellectual Property Institute of Canada (IPIC)
  • American Intellectual Property Law Association (AIPLA)