Patents by Inventor Valdemar Skov

Valdemar Skov 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).

  • Multi-mode intrusion alarm system
    Patent number: 4117479
    Abstract: A multi-mode intrusion alarm system having three different operating modes for providing different indications of present and past occurrence of alarm signals from a plurality of sensors. The different modes allow determination of which sensor produced the alarm signal, investigation of the protected area after occurrence of an alarm signal without disturbing such determination and resetting of the system. The system can include circuitry for automatic mode selection and for providing a warning when the system has not been properly reset.
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: September 26, 1978
    Assignee: American District Telegraph Company
    Inventors: Aaron A. Galvin, L. Dennis Shapiro, Valdemar Skov