Patents by Inventor Mark Shepherd, Jr.

Mark Shepherd, 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).

  • Protective alarm system for window using reflected microwave energy
    Patent number: 4092636
    Abstract: A simplified protective system as for a home burglar alarm comprises a beam generator such as a solid state microwave module along with a detector and alarm or indicator. The beam generator and detector unit is positioned along a line-of-sight normal to a window or other object being monitored. A reflector such as a mirror on the window reflects the beam back to the detector. When the window is moved or broken, the beam does not reach the detector and the alarm is actuated.
    Type: Grant
    Filed: July 5, 1977
    Date of Patent: May 30, 1978
    Assignee: Texas Instruments Incorporated
    Inventor: Mark Shepherd, Jr.