Siren speaker

Details Siren speaker Siren speaker

1997-04-02

1998-09-01

Jackson, Marcus A.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

1006

Patent

active

D03976360

REFERENCES:
patent: D224276 (1972-07-01), Kahn
patent: D279965 (1985-08-01), Mikami
patent: D292895 (1987-11-01), Hayashi
patent: D313195 (1990-12-01), Memmola
patent: D345317 (1994-03-01), Issa

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