Carradine's death last June at the age of 72 was ruled asphyxiation by hanging that was not a suicide. The "Kung Fu" and "Kill Bill" actor was found hanging naked in a hotel closet with a rope tied around his neck and genitals.
E! News said Anne Carradine filed a lawsuit Thursday against France's MS2 S.A. film production company with which David Carradine had been collaborating on a movie called "Stretch" at the time of his death.
Anne Carradine is demanding unspecified damages from the company, alleging it violated its contract and failed to give her husband "sufficient assistance" while he was on location for the film, E! News said.