Established Practice

McDermid Turnbull & Associates was founded in 1988 by Neil McDermid, whose practice has served Canadian and International clients since 1969.

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 Quality Service

Recognized for its high quality and personalized service to clients, our firm handles patent and trade-mark matters on behalf of Canadian and international clients.

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 Depth of Experience

Our depth of experience allows us to offer our clients focused, practical, strategic management of their IP portfolios and timely advice to ensure they achieve the greatest benefit from their intellectual property.

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 Ongoing Support

The relationships we establish with our clients facilitates our continuous support and communication to ensure nothing is overlooked.

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Latest News


I have sought strategic trade-mark advice from Karen on different occasions with regard to both trade-mark procurement and trade-mark portfolio management. Having worked with many Trade-mark Agents throughout my career, my experiences with Karen were refreshing. Her professional experience, matched with her ability to think outside the box, provided me with a solid, strategic approach which allowed me to manage the issues at hand and achieve the desired results.
Cynthia Stark

Cynthia Stark

Vice President, Global Digital Strategy at Sun Life Financial

Our Team

Karen Turnbull

Registered Trade-mark Agent

As the managing partner of McDermid Turnbull & Associates, Karen has over 16 years’ experience in Trade-mark Law and became a Registered Trade Mark Agent in 1998.

Trina Sarin

Patent Agent

Trina Sarin focuses primarily on drafting and prosecuting patent applications, in the fields of electronics, telecommunications and mechanical systems.

kellee martin
Kellee Martin

Patent & Trademark Agent Assistant

Kellee Martin is our Senior Patent and Trademark Agent Assistant.  She manages the firms prosecution of patents and trademarks.  Kellee joined the firm in December 1996.