Santosh K. Chari

Patent Agent



Year of Call:

Patent Agent (Canada), 1993 
Patent Agent (United States), 1997
Registered Professional Engineer (P.Eng.) - Ontario


B.A.Sc., Chemical Engineering, University of Ottawa

B.Sc., Biochemistry, University of Ottawa


Santosh is a founding partner of CPST Intellectual Property Inc. and is recognized domestically and internationally as a leading advisor on IP prosecution issues.

With over 30 years of experience in the patent profession, Santosh provides clients with guidance and business-focussed advice on the protection of intellectual property, with a particular focus on the preparation and prosecution of patent and industrial design applications. He also advises on infringement and validity issues relating to intellectual property and on licensing and patent portfolio management issues.

Santosh has expertise in various technologies including biotechnology, pharmaceutical and chemical subject matters, medical devices, cannabis, and oil and gas sector, including both upstream and downstream sectors.  He also has a deep understanding of the protection of industrial designs, having assisted clients in fields such as power and hand tools, electronic devices and icons, and consumer products.

Santosh has managed the prosecution of patent and industrial design applications before many intellectual property offices throughout the world and has represented clients of various sizes, including private enterprises and public institutions, such as universities and government departments.

Santosh is a regular speaker at domestic and international conferences held by various organizations.

Santosh has been recognized as a leading professional by the following international publications:

  • IAM Patent 1000: The World's Leading Patent Practitioners
  • Who’s Who Legal: Patents
  • Who’s Who Legal: Canada
  • Managing Intellectual Property IP Stars
  • LMG Life Sciences - Life Sciences Star
  • Intellectual Property Institute of Canada (IPIC)
  • American Intellectual Property Law Association (AIPLA)
  • Intellectual Property Owners Association (IPO)
  • International Association for the Protection of Intellectual Property (AIPPI)
  • Past-chair of the IPIC International Patent Issues Committee
  • IPO Canadian Practice Committee
  • IPO International Patent Law and Trade Committee
  • Has represented the Canadian patent agent profession before the World Intellectual Property Organization (WIPO).

Santosh is a regular speaker at domestic and international conferences held by various organizations.

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