About Us

Founded over 30 years ago, Deeth Williams Wall LLP has grown from seven lawyers to close to 20, covering all aspects of IP prosecution, commercialization and enforcement; technology law; emerging technology protection and commercialization; privacy and data breach protection, management and coaching; litigation; and regulatory law. The firm acts for a number of large businesses, including an international oilfield services company, a provincial government, a major inter-bank data network, a top-tier hospital, an international soft drink company, an international retailer, and a number of Canadian tech start-ups. The firm has acted for several international drug companies on patent litigation, PM(NOC), and regulatory matters.  It also provides day-to-day patent and trademark advice for major food, chemical, automotive and retail companies. Deeth Williams Wall and its lawyers have been ranked as an industry leader both in Canada and internationally by Lexpert Magazine, Canadian Lawyer, Best Lawyers of Canada, Who’s Who Legal, Legal 500, Chambers Canada, and several other publications.


Our Practice

In founding Deeth Williams Wall, we had very specific beliefs that drove us to leave partnerships in a big firm to start a boutique. We believed that there had to be a better way to treat our clients, our lawyers and staff. Our job was to work on behalf of our clients and adapt our business to fit our clients’ needs. We are passionate about excellence, serving our clients well and loving what we do. These principles have guided our practice of law, and how we have carried on business, for over 30 years. They are the basis of the services and value we want to provide to you.

That’s one of the reasons why we’ve been recognized as one of top IP and IT law boutiques in Canada and abroad.

Founding Partners

ddeeth@dww.com 416-941-9442
Doug Deeth is a founding member and the managing partner of the firm. He practises exclusively in the areas of intellectual property and technology law, concentrating on litigation and licensing matters.

Amy-Lynne Williams is a founding member of the firm.  She retired from active practice at the end of September 2023. 

gwall@dww.com 416-941-9001
Gervas Wall is a founding member of the firm. He practises intellectual property law, including patent, trade secret, and trademark related litigation.
mcoates@dww.com 416-941-9026
Marijo Coates is a founding member of the firm. She practises intellectual property law with an emphasis on trademark licensing and protection.
vbutsky@dww.com 416-941-9002
Victor Butsky is a founding member of the firm. He practises intellectual property law with an emphasis on litigation and licensing.

Contact Info

150 York St., Suite 400
Toronto, Ontario
M5H 3S5, Canada

T 416.941.9440

F 416.941.9443

E info@dww.com

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