Gelsing.ca is the patent and trademark practice of Sander Gelsing, an intellectual property lawyer based in Red Deer, Alberta who is a partner at Warren Sinclair LLP. The practice handles patent and trademark applications, oppositions, and litigation for clients across Canada and internationally, with representation before the Canadian Intellectual Property Office and the Federal Court. It has registered hundreds of patents and trademarks and serves both Canadian and foreign clients seeking Canadian IP protection.

Where to find them

Warren Sinclair LLP, Suite 600, 4911 - 51 Street, Red Deer, Alberta, T4N 6V4 · 403-343-3320

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Listing compiled from the firm’s public website in July 2026. Verify licence status in the Law Society of Alberta directory ↗