Patents by Inventor Calvin D. Bergsma

Calvin D. Bergsma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Photographic modifier method and apparatus for graphics and the like
    Patent number: 4545673
    Abstract: A photographic modifier and method for photographically modifying graphics and the like. A first transparent support which carries an image is overlaid on one side by a second transparent support which carries a photosensitive material. A light housing containing a light is movable across the first and second supports on the other side of the first support for exposing the image onto the photosensitive material. One of the first or second supports is movable simultaneously with the light housing to create a modification of the image on the photosensitive material as the light exposes the image thereon.
    Type: Grant
    Filed: July 8, 1983
    Date of Patent: October 8, 1985
    Inventor: Calvin D. Bergsma