At the time of the formation of the MPPC, Thomas Edison owned most of the major patents relating to motion pictures, including that for raw film. The MPPC vigorously enforced its patents, constantly bringing suits and receiving injunctions against independent filmmakers. Because of this, a number of filmmakers responded by building their own cameras and moving their operations to Hollywood, California, where the distance from Edison's home base of New Jersey made it more difficult for the MPPC to enforce its patents.