Wall-mounted smoke detector

Details Wall-mounted smoke detector Wall-mounted smoke detector

1976-10-08

1977-12-13

Lucas, Susan J.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Alarm or control thereof

D1005

Patent

active

D02466350

REFERENCES:
faraday Catalog & Handbook of Electrical Signals, No. 61-DA, rec'd 1949, p. 5, signal (center right).
Hardware Age, Dec. 1975, p. 63, smoke/fire alarm.

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