Patents by Inventor David John Todeschini

David John Todeschini 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).

  • Optical laser security system
    Patent number: 3987428
    Abstract: An optical laser is operated in a continuous mode and modulated by a random noise generator. The laser beam is split into parallel beams which are reflected throughout the area by mirrors and each directed into a photo sensitive electronic receptor circuit which electronically combines the output signals of the parallel beams of laser light. The combined output is electronically compared with the signal employed to modulate the laser beams, with an alarm circuit triggered when any difference is detected between the output signal generated by the laser beams and the input modulating signal.
    Type: Grant
    Filed: June 16, 1975
    Date of Patent: October 19, 1976
    Assignee: The Raymond Lee Organization, Inc.
    Inventor: David John Todeschini