Patents by Inventor Bart M. Jacob

Bart M. Jacob 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).

  • Friction type game call
    Patent number: 4387531
    Abstract: A friction game call includes a cylindrical wall with an open, diagonally truncated end to be held against the body, and another end closed by a slate loosely held in an oversized slot in the cylindrical wall so that the slate may vibrate in response to a striker grasped by a hand also holding the game call. The cylindrical wall extends past the held slate.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: June 14, 1983
    Inventor: Bart M. Jacob
  • Tube type diaphragm game call
    Patent number: 4179845
    Abstract: The invention is a simple mechanical method of producing and reproducing various sounds with a tube type diaphragm game call. A hollow plunger sliding within a tube type call, being spring and finger operated, provides a sound chamber varying in size; a means of changing the diaphragm size; and a means of manipulating the diaphragm.
    Type: Grant
    Filed: July 25, 1977
    Date of Patent: December 25, 1979
    Inventor: Bart M. Jacob