Elliptical air horn bell

Details Elliptical air horn bell Elliptical air horn bell

1995-02-13

1997-04-29

Jackson, Marcus A.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

Patent

active

D03789934

REFERENCES:
patent: D45024 (1913-12-01), Sparks
patent: D62483 (1923-06-01), Goldfarb
patent: D99040 (1936-03-01), McBroom
patent: D114960 (1939-05-01), Nielsen
patent: D235747 (1975-07-01), Sweany
patent: D269417 (1983-06-01), Shintaku
patent: D279965 (1985-08-01), Mikami
A copy of a 1993 Hadley Products Systems & Accessories Catalog Illustrating various air horns. Prior to Feb. 1995.
A copy of a Grover Products Company Air Horn Catalog. prior to Feb. 1995.

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