Fashion “dupes,” or less expensive versions of high-end clothing and other accessories, are just about everywhere these days. They're also drawing some businesses into legal battles. In the latest example,

In a 49-page lawsuit filed in California, Lululemon accused the retail wholesaler of selling knockoff versions of its Scuba clothing and popular ABC men’s pants.

Lululemon Athletica claims in its lawsuit filed in the U.S. District Court for the Central District of California that Costco has "unlawfully traded" on its reputation, goodwill and sweat equity by selling unauthorized and unlicensed apparel that uses knockoff, infringing versions of its patents.