Patents by Inventor Clarence Greaf

Clarence Greaf 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).

  • Video game target reset apparatus
    Patent number: 4006898
    Abstract: Apparatus for returning the target to play in an electronic video game. Target return is initiated by detecting the coincidence of a player marker with a game boundary or another player marker. Separate reset switches are eliminated without depriving player participants of game control and protection against an inadvertent reset is provided.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: February 8, 1977
    Assignee: The Magnavox Company
    Inventors: Clarence Greaf, William R. Price