Patents by Inventor John C. Wirth, Jr.

John C. Wirth, Jr. 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).

  • Power tool theft alarm
    Patent number: 4151521
    Abstract: The internal impedance loads of a plurality of electrical appliances on display are directly connected in series through their power switches and power cords by a connector strip to form a detection circuit. Interruption of the detection circuit is sensed by a relay to activate a power operated alerting device. Continuity of the detection circuit is maintained by plugging all of the power cords into the connector strip and holding all of the power switches closed by removable binding tape or the like.
    Type: Grant
    Filed: September 15, 1977
    Date of Patent: April 24, 1979
    Inventor: John C. Wirth, Jr.