Patents by Inventor Peter J. Barowitz

Peter J. Barowitz 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).

  • Vibration responsive intruder alarm systems
    Patent number: 4223304
    Abstract: Electric signals in two narrow frequency bands, centered on thirty-three and one hundred Hertz, arising from ground or airborne vibrations incident on one or more geophones are processed to give an alarm when signal components in the two bands exhibiting a rapid rise to greater than a predetermined amplitude level, characteristic of human footsteps within a protected area, occur at more than a predetermined repetition rate.
    Type: Grant
    Filed: April 21, 1978
    Date of Patent: September 16, 1980
    Assignee: Elliott Brothers (London) Limited
    Inventors: Peter J. Barowitz, Roy Baxendale