Patents by Inventor William D. Eich

William D. Eich 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).

  • Film holding and agitating apparatus
    Patent number: 4423945
    Abstract: An apparatus for use in developing film is disclosed. The apparatus is designed to hold the film during development in a processing solution. The apparatus fits and substantially closes the processing solution cannister to provide a substantially lightless processing environment. The apparatus further moves the film during development to agitate the processing solution.
    Type: Grant
    Filed: May 26, 1982
    Date of Patent: January 3, 1984
    Assignee: G and G Products, Inc.
    Inventors: Seaton T. Preston, Frank L. Greenwald, William D. Eich, Robert Berger