Medical device maker C.R. Bard Inc. has sued rival U.S. SurgicalCorp. in Delaware for allegedly infringing a patented method forrepairing hernias with a special fabric.

Murray Hill, N.J.-based Bard contends in a suit filed May 7 in U.S.District Court in Wilmington that U.S. Surgical is selling a “SurgiProHerniaMate Plug” that uses technology protected by a 1994 patent thatwas assigned to Bard.