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Class Information
Number: 342/28
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Presence detection only > By motion detection
Description: Subject matter wherein the presence of a target is detected by sensing target movement.

Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
3990081 Doppler radar device Nov. 2, 1976
3987427 Doppler detection device with phase shift means to inhibit false alarms Oct. 19, 1976
3986182 Multi-zone intrusion detection system Oct. 12, 1976
3967283 Large area motion sensor Jun. 29, 1976
3964063 Traffic-surveillance system Jun. 15, 1976
3947834 Doppler perimeter intrusion alarm system using a leaky waveguide Mar. 30, 1976
3943513 System and method for selecting Doppler altered reflected signals Mar. 9, 1976
3942178 Intrusion detection system Mar. 2, 1976
3932871 FM/CW surveillance radar system with range gating Jan. 13, 1976

1 2 3 4 5 6 7 8

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