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

D03976351

REFERENCES:
patent: D297918 (1988-10-01), Kamada
patent: D313195 (1990-12-01), Memmola

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