Siren

Details Siren Siren

1985-02-21

1987-11-24

Kemper, Catherine E.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

Patent

active

D02928957

REFERENCES:
patent: D224276 (1972-07-01), Kahn
patent: D253401 (1979-11-01), Benson et al.
patent: D279771 (1985-07-01), Hinata
patent: D279965 (1985-08-01), Mikami
patent: 2172413 (1939-09-01), Scott
patent: 4171677 (1979-10-01), Hibell

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