The U.S. District Court lawsuit, which Sears filed along with subsidiary KCD, accuses Rockhard Laboratories LLC of trademark infringement and deceptive trade practices, the Chicago Sun-Times reported Friday.
KCD is the owner of the Diehard brand, which includes car batteries, auto parks, hats and boots sold at Sears.
The suit states Rockhard Laboratories has been using the brand name "Die Hard" for a "numbing agent for male genitalia" since 2010.
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