Fire alarm

Details Fire alarm Fire alarm

1976-06-30

1977-12-20

Lucas, Susan J.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Alarm or control thereof

D1005

Patent

active

D02467011

REFERENCES:
patent: D213027 (1968-12-01), Walz
patent: D225379 (1972-12-01), Gallagher
Progressive Architecture, June 1975, p. 95, Ionization Detector, left.

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