Patents by Inventor Robert Friedenthal

Robert Friedenthal 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).

  • Backgammon set with folding parts for retraction and extension
    Patent number: 4261576
    Abstract: The board of a backgammon set is characterized by a central box portion and oppositely deployed festoon portions. The box portion serves as the bar during play and as a container during storage. The festoon portions are extended as tables during play and retracted into the box portion during storage, with the playing pieces.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: April 14, 1981
    Inventor: Robert Friedenthal
  • Reusable karate striking board
    Patent number: 4083557
    Abstract: A karate practice board for subjection to hand and foot strikes, simulates frangibility and permits reassembly by means of a multi-component structure that is characterized by a special tongue and groove relationship.The practice board is made of first and second parts, the parts being along a longitudinal edge thereof by a tongue and groove joint. The first part having a tongue and groove configuration along one of its edges and the second part having a tongue and groove configuration along one of its edges. The configuration of the parts are seen to be a mirror image of each other when the parts are joined by the configuration to form the board. The strength of the material of the board is such that shattering of the parts along the mating edge is avoided when the parts are separated as a result of impact by a user.
    Type: Grant
    Filed: August 26, 1976
    Date of Patent: April 11, 1978
    Inventor: Robert Friedenthal
  • Reusable karate striking board
    Patent number: 4052056
    Abstract: A karate practice board, for subjection to hand and foot strikes, comprises permanent and disposable parts, by which the practice board inexpensively simulates frangibility and permits reassembly. The permanent parts of the board being similar in configuration and each being provided with a concavity in an edge portion thereof. The disposable parts being smaller than the permanent parts and being configured to removably slide into the concavities whereby the permanent parts can be temporarily joined at their edges such that they will appear as a single board. Upon striking the board with a predetermined force, the insert part will be severed to separate the permanent parts. The severed insert part will be removed from the concavity of each permanent part and another insert part will be inserted to render the board reusable. Each insert part having a different strength which will require a different predetermined severing force.
    Type: Grant
    Filed: August 26, 1976
    Date of Patent: October 4, 1977
    Inventor: Robert Friedenthal