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Patent applications and USPTO patent grants for Gershberg; David N..The latest application filed is for "ranging quadrature doppler microwave intrusion alarm system".
Patent | Date |
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Ranging quadrature doppler microwave intrusion alarm system Grant 4,286,260 - Gershberg , et al. August 25, 1 | 1981-08-25 |
Doppler perimeter intrusion alarm system using a leaky waveguide Grant 3,947,834 - Gershberg , et al. March 30, 1 | 1976-03-30 |
Ultrasonic-microwave Doppler Intrusion Alarm System Grant 3,801,978 - Gershberg , et al. April 2, 1 | 1974-04-02 |
Electromagnetic Wave Receiver Grant 3,735,409 - Gershberg , et al. May 22, 1 | 1973-05-22 |
Differential Doppler Detection For Rf Intruder Alarm Systems Grant 3,728,721 - Lee , et al. April 17, 1 | 1973-04-17 |
Motion Detection System With Split-ring Monostatic Doppler Detection Grant 3,703,722 - Gershberg , et al. November 21, 1 | 1972-11-21 |
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