Bell

Details Bell Bell

1991-07-24

1994-01-04

Burke, Wallace R.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

Patent

active

D03429156

REFERENCES:
patent: D3160 (1868-08-01), Cone
patent: D9730 (1877-02-01), Bevin
patent: D11529 (1879-12-01), Goff
patent: D12563 (1881-11-01), Goff
patent: D145511 (1946-09-01), Darvie
patent: D272523 (1984-02-01), P'eng
patent: 449146 (1891-03-01), Watrous
patent: 1349694 (1920-08-01), Roy
patent: 1528463 (1925-03-01), Yungk
patent: 4349065 (1982-09-01), Schall
Altman's Catalog p. 87 1976( N-Jungle Bells Belt).

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