Lexpert Ranked Law Firm

Deeth Williams Wall LLP

Deeth Williams Wall LLP is an innovative, entrepreneurial law firm, dedicated to helping clients develop, protect and commercialize all types of intellectual property and technology. Its partners specialize in all aspects of intellectual property and technology law, with particular expertise in information technology and health care. The firm’s clients include Canadian and international leaders in the information technology, telecommunications, pharmaceutical, biotechnology, health care, financial services, oil and gas, franchising, consumer products and food and beverage industries. Deeth Williams Wall lawyers combine legal expertise with an intimate knowledge of the client’s business. The firm’s goal is to ensure that the legal rights of its clients are protected, while adding value to their businesses. Meeting the client’s need for personal, experienced, hands-on, timely and cost effective advice is always the top priority.


Information Technology: (Contacts: Amy-Lynne Williams, James Kosa, Richard Austin) Deeth Williams Wall advises creators, owners and users of information technology, on all aspects of developing, acquiring, protecting and commercializing technology. The firm deals with transactions and issues involving privacy, outsourcing, networks, licensing, consulting services, technology transfer, joint ventures, electronic publishing, multimedia, electronic commerce and dispute resolution. The firm’s clients include both producers and users of technology, as well as other legal, financial and technical professionals who provide products and services to the information technology industry.

Intellectual Property: (Contacts: Gervas Wall, Patents and Copyright; Marijo Coates, Trademarks) The firm advises clients on clearance, protection and enforcement of patents, trademarks, copyright, industrial designs, trade secrets and use of regulatory processes to derive optimal benefits from their intellectual property. The firm advises in the negotiation of all forms of agreements to commercialize intellectual property, including licences, acquisitions, franchises and joint ventures.

Litigation: (Contacts: Doug Deeth, Gervas Wall, Kavita Ramamoorthy) The firm’s litigators represent clients in contractual disputes, infringement actions, oppositions and administrative hearings. The firm has the capability to act quickly and effectively in judicial review proceedings and other urgent matters. The firm also represents clients in arbitration and mediation proceedings.

Health Care: (Contact: Doug Deeth, Gervas Wall, Gordon Jepson) Deeth Williams Wall assists Canadian and international clients with the regulatory applications, trials, approvals and lobbying which are required to clear new technology for use in Canada. The firm has rapidly acquired an international reputation as a leader in the health care field. The firm advises Canadian clients on patent and trademark protection, packaging and labelling, regulatory compliance, marketing and distribution of medical devices, pharmaceuticals, and biotechnology products.


Marijo Coates: Marijo’s expertise includes advising on commercial transactions involving IP licensing, merchandising, distribution and supply agreements. Marijo handles the IP portfolios of clients in Canada and abroad, including the prosecution and enforcement of the clients’ IP rights. The businesses range from cosmetics and food to the automotive industry, chemicals and software technology. Marijo is active in the CBA, IPIC, INTA, and MARQUES. Marijo has written and spoken on various aspects of trademark law and edited texts on Canadian trademark practice and procedure. She is the author of Register Your Trade-mark in Canada, published by International Self-Counsel Press. She was called to the Ontario Bar in 1983 and the Nova Scotia Bar in 1986. She is a Registered Trademark Agent.

Douglas N. Deeth: Recognized in international reviews, including The Lexpert®/American Lawyer Guide to the Leading 500 Lawyers in Canada, as one of Canada’s leading intellectual property and IP litigation lawyers. Practice combines extensive litigation experience with expertise in product acquisition and licensing, particularly in the pharmaceutical area. Advises on clearance, protection and enforcement of intellectual property rights; appears before the FCC and the Ontario courts. Former member of the Executive of the CBA(O) Intellectual Property Section; current President of FICPI Canada; member of the IPIC, AIPLA, AIPPI and FICPI. Called to the Ontario Bar (1976) and Registered Patent and Trademark Agent and Professional Engineer in the province of Ontario.

Gervas W. Wall: Gervas’s practice extends from the prosecution of patent and trademark applications to intellectual property litigation. He appears in the courts of the Province of Ontario, the Federal Court of Canada and before the Trade-marks Opposition Board and Patent Appeal Board. Gervas has over 30 years of experience in litigation in intellectual property and information technology, including trials and injunctions. He advises on complex licensing issues and has acted as special intellectual property counsel in major corporate transactions and to international organizations. Gervas is a member of the CBA and intellectual property organizations including AIPPI and AIPLA. He is a fellow of the IPIC and teaches the annual patent agent tutorials. Gervas writes and speaks regularly on intellectual property matters, including patent protection, licensing and security interests in intellectual property. He was called to the Ontario Bar in 1981 and is a Registered Patent and Trademark Agent.

Amy-Lynne Williams: Amy-Lynne Williams practises exclusively in the area of information technology law. A winner of a 2009 Lexpert Zenith Award, and named as Best Lawyers' "Toronto Information Technology Lawyer of the Year", for 2012 and 2014, Best Lawyers’ "Toronto Technology Law Lawyer of the Year" for 2013 and 2016, she is also listed in the Lexpert® Guide to the Leading US/Canada Cross-Border Corporate Lawyers in Canada and is a Most Frequently Recommended Technology Transaction lawyer in The Canadian Legal Lexpert® Directory. She is listed in The Best Lawyers in Canada, as well as Expert Guides “Best of the Best”, and is recommended as a “leading individual” under IT in Chambers Global: The World’s Leading Lawyers for Business. Amy-Lynne advises on outsourcing, privacy, e-commerce and Internet issues, international and domestic agreements for systems, and technology transfers. She is a past president of the International Technology Law Association and a past president of the Canadian IT Law Association (IT.Can) (2000–2002). Amy-Lynne has testified as an expert witness on outsourcing agreements and has served as an arbitrator on an international arbitration panel dealing with an IT dispute. She was called to the Ontario Bar in 1980.


150 York St, Suite 400
Toronto, ON, Canada, M5H 3S5
Phone: (416) 941-9440
Fax: (416) 941-9443

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Mentioned in Lexpert Publications

  • Nintendo wasn’t expecting a major payout when it sued a small retailer for copyright infringement. What it expected was far more valuable — to redefine the law around media piracy.
  • Elimination of prior-use requirement will make it easier for trademark registrants to press their claims By Julius Melnitzer CANADA'S BUSINESS community and most – but not all – of the ...
Deeth Williams Wall LLP is a Lexpert-Ranked Firm in the following practice areas
Computer & IT Law Toronto, Ontario Most Frequently Recommended
Intellectual Property Toronto, Ontario Consistently Recommended
Litigation - Intellectual Property Toronto, Ontario Repeatedly Recommended
Technology Transactions Toronto, Ontario Consistently Recommended
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