The Globe and Mail reports in it Monday edition that Lululemon is suing Costco for allegedly infringing on its intellectual property by selling knockoffs of popular products. A Canadian Press dispatch to The Globe reports that the lawsuit claims some fakes are sold under Costco's Kirkland label, while others are made by Danskin, Jockey and Spyder. The lawsuit says, "Some customers incorrectly believe these infringing products are authentic Lululemon apparel while still other customers specifically purchase the infringing products because they are difficult to distinguish from authentic Lululemon products, particularly for downstream purchasers or observers." Lululemon alleges these scenarios take advantage of patents it holds, as well as the reputation and goodwill it has built with customers. Lululemon's 49-page court filing states that it attempted to address the dupes by sending cease and desist letters to Costco but is now seeking a jury trial to have the court order Costco to stop manufacturing, importing, marketing and selling the alleged dupes. Lululemon seeks to have Costco remove any on-line or print ads for alleged dupes and is asking the court to require Costco to cover lost profits from these products.