Patents by Inventor Jack M. Dempsey

Jack M. Dempsey 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).

  • Treadle alarm system
    Patent number: 4245219
    Abstract: An alarm system embodied in a treadle pad is biased open and can be closed by the application of pressure on the pad or by the removal of weight from it in another mode. Closing of the alarm switch relays an electrical signal through a control unit to actuate a d.c. powered audible or visual signal. The device has many practical applications and features simplicity and economy.
    Type: Grant
    Filed: May 24, 1979
    Date of Patent: January 13, 1981
    Inventors: Gene M. Dempsey, Jack M. Dempsey