Wal-Mart Stores Inc., the world's largest retailer, was sued by wheeled-footwear maker Heelys Inc. for making knockoff skates that Heelys claims violate a patent.
Heelys' shoes, which cost about $60 a pair, come with a removable wheel in the sole, allowing wearers to move from walking or running to skating by shifting weight to their heels.
Wal-Mart sells a knockoff model called "spinners" that violate Heelys patent titled "multiwheel heeling apparatus," Heelys said in a complaint filed Oct. 5 in Dallas federal court.
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"Wal-Mart's infringing acts are causing irreparable harm" without "adequate remedy," Heelys said in the complaint.