In the 49-page lawsuit filed in California, Lululemon shows the alleged design similarities of its products with Costco’s, as ...

Lululemon is suing Costco for allegedly infringing on its trademarks and design patents by selling dupes of its clothes.

Lululemon is almost literally looking to sue the pants off Costco. In a lawsuit filed Friday, the Canada-based athleisurewear company claimed Costco was violating its patents by selling “knockoff” ...

An aggressive approach by Lululemon to sue Costco. I wonder why there was no pre-litigation business solution. Costco ...

Lululemon is suing Costco, claiming the retailer's Kirkland brand sells similar clothing, including pants and jackets, at lower prices, misleading customers. Lululemon seeks lost revenue and for ...