Smoke detector

Details Smoke detector Smoke detector

1978-06-28

1980-09-16

Stallard, W.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Alarm or control thereof

D10121, D1005

Patent

active

D02568977

REFERENCES:
patent: D213028 (1968-12-01), Walz
patent: D215974 (1969-11-01), Berns
patent: D242133 (1976-11-01), Fitzsimonds
patent: D244362 (1977-05-01), Mayer

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