Patents by Inventor John R. Grube

John R. Grube 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).

  • Playing piece for a board game
    Patent number: 4343476
    Abstract: A playing piece for a board game, such as checkers, or the like, has a base, a stem which is mounted centrally in the base and which has a portion protruding above the base and a sliding jacket that is movable between an upper position surrounding the protruding portion of the stem and a lower position exposing the protruding portion of the stem.
    Type: Grant
    Filed: June 30, 1980
    Date of Patent: August 10, 1982
    Inventors: Robert W. Engel, John R. Grube