Patents by Inventor Marshall E. Sink

Marshall E. Sink 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).

  • Air tube game apparatus
    Patent number: 4150830
    Abstract: Game apparatus for use by opposing players includes a housing having a pair of playing surfaces and first and second arrays of apertures provided on each playing surface. Tubes interconnect the apertures of each first array with apertures of the second array on the other playing surface. The tubes are detachably connected and may be positioned in random orientation.
    Type: Grant
    Filed: February 21, 1978
    Date of Patent: April 24, 1979
    Inventor: Marshall E. Sink