Talking smoke detector

Details Talking smoke detector Talking smoke detector

1988-08-12

1990-10-16

Gandy, James M.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Alarm or control thereof

Patent

active

D03113485

REFERENCES:
patent: D253169 (1979-10-01), Conforte
patent: D258353 (1981-02-01), Mango et al.
patent: D297316 (1988-08-01), Mastro
patent: 4525703 (1985-06-01), Bellino

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