Patents by Inventor David Shorkey

David Shorkey 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).

  • Audio oscillator output device with pressure sensitive advance mechanism
    Patent number: 4673893
    Abstract: A waterproof audible sound producing device for use by swimmers to adjust their stroke rate. A frequency control moves through a spectrum of frequencies on an incremental basis when a signal is received from a pressure sensitive signaling button. A slide switch allows the user to choose between at least two sets of frequencies and each set of frequencies contains less than five discrete frequencies and a zero output where there is no audible sound produced.
    Type: Grant
    Filed: December 9, 1985
    Date of Patent: June 16, 1987
    Inventor: David Shorkey