Patents by Inventor Glen E. Spieth

Glen E. Spieth 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).

  • Anti-theft alarm circuit and compatible warning plugs
    Patent number: 4300130
    Abstract: An anti-theft alarm circuit and compatible warning plugs; the warning plugs are designed to look to be an integral part of the stereo component or appliance to which they are attached. When the warning plugs are disconnected, however, the alarm system is activated.
    Type: Grant
    Filed: October 29, 1979
    Date of Patent: November 10, 1981
    Inventors: Robert K. Fotheringham, Glen E. Spieth