An Alpharetta company is suing three other firms on claims they infringed on its patent for Cinchpad, an absorbent pad and impermeable membrane, protecting the work surface and equipment during a gastrointestinal procedure.

After surgery, medical staff can use the Cinchpad's drawsting to close it for easy removal.

EndoChoice filed a complaint against Austin Medical Inc., AVID Medical Inc. and Cygnus Medical LLC in the U.S. District Court for the Northern District of Georgia, alleging that each defendant makes and/or sells a scope transport pad that infringes EndoChoice's patent.