Fire alarm

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof

Patent

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Details

D1005, D1105

Patent

active

D02471639

REFERENCES:
patent: D96362 (1935-07-01), Abramson
patent: D151755 (1948-11-01), Glunz et al.
patent: D157459 (1950-02-01), Zelchenko
patent: 1787357 (1930-12-01), Capocci
patent: 2094295 (1937-09-01), Geisenheimer
patent: 2784529 (1957-03-01), Prestigiacomo
patent: 3014124 (1961-12-01), Yakem

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