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Riches, McKenzie & Herbert LLP carries on the tradition of Charles H. Riches, who founded one of Canada's oldest law firms specializing in patent and industrial design in 1887. CMPA has protected our clients' intellectual properties in Canada and around the globe for over a century. Riches, McKenzie & Herbert LLP is a boutique intellectual property (IP) law firm that also specializes in patent, trademark, and copyright procurement, maintenance, enforcement, and litigation.