PORTLAND Nike has sued Wal-Mart Stores, alleging the giant retailer is selling shoes that infringe on Nike's patented designs. Nike says in its...

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PORTLAND — Nike has sued Wal-Mart Stores, alleging the giant retailer is selling shoes that infringe on Nike’s patented designs.

Nike says in its complaint, filed Monday, that the Wal-Mart shoes too closely resemble its Nike Shox footwear. Those shoes have a springlike device in the heel.

Nike wants the world’s largest retailer to stop selling the shoes and seeks damages, according to the complaint filed in the U.S. District Court for the Northern District of Illinois.

Wal-Mart said it does not comment on pending litigation.

Nike does not sell its own product in Wal-Mart and has long argued that its brand would be devalued if sold in discount chains.