Hand bell

Details Hand bell Hand bell

1992-11-12

1994-02-01

Burke, Wallace R.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

Patent

active

D03438058

REFERENCES:
patent: D164737 (1951-10-01), Sarna
patent: D167282 (1952-07-01), Sarna
patent: D272523 (1984-02-01), P'eng

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