Superhorn

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Aural – i.e. – audible

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Details

D14204, D14208

Patent

active

D03754634

REFERENCES:
patent: D42971 (1912-09-01), Manson
patent: D44591 (1913-08-01), Scognamillo
patent: D45344 (1914-03-01), Manson
patent: D46917 (1915-02-01), Sparks
patent: D182351 (1958-03-01), Avedon
patent: D235747 (1975-07-01), Sweany
patent: D264841 (1982-06-01), Pickrel
patent: D279965 (1985-08-01), Mikami
patent: 1052416 (1913-02-01), Hutchison
patent: 4071112 (1978-01-01), Keele, Jr.

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