Siren

Details Siren Siren

1985-05-29

1987-10-27

Kemper, Catherine E.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

Patent

active

D02924986

REFERENCES:
patent: D215977 (1969-11-01), Berns
patent: D215978 (1969-11-01), Berns
patent: D226137 (1973-01-01), Selsby
patent: D235747 (1975-07-01), Sweany
patent: D269417 (1983-06-01), Shintaker
patent: D279771 (1985-07-01), Hinata
patent: D279965 (1985-08-01), Nirkanri
patent: 4171677 (1979-10-01), Hibell

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