Smoke detecting photoelectric sensing chamber

Details Smoke detecting photoelectric sensing chamber Smoke detecting photoelectric sensing chamber

1983-01-24

1985-02-12

Bullock, B. J.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Alarm or control thereof

Patent

active

D02775581

REFERENCES:
patent: D270625 (1983-09-01), Hiltenbrand
patent: 3555532 (1971-01-01), White et al.
patent: 3579216 (1971-05-01), Vasel
patent: 3723747 (1973-03-01), Steele
patent: 3976891 (1976-08-01), Parkinson

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