Patents by Inventor Frank H. Hoffmann

Frank H. Hoffmann 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).

  • Camera interface
    Patent number: 4378572
    Abstract: A pulse generating electronic circuit is utilized as a matching network between a line operated video tape recorder (VTR) and a battery powered portable camera. Through the use of appropriate logic circuitry, the pause control button of the VTR, which normally operates to provide an on or off signal pulse, is disabled, and the time delay experienced by a camera activated electrical signal passing through the VTR electronics is utilized to generate the on or off signal pulse.
    Type: Grant
    Filed: January 29, 1981
    Date of Patent: March 29, 1983
    Assignee: Professional Products, Inc.
    Inventor: Frank H. Hoffmann