Passive infra red detector

Details Passive infra red detector Passive infra red detector

1992-06-24

1993-09-28

Douglas, Alan P.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Alarm or control thereof

Patent

active

D03397599

REFERENCES:
patent: D302951 (1989-08-01), Kotlicki et al.
patent: D302952 (1989-08-01), Soloway et al.

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