Bell

Details Bell Bell

1993-10-25

1994-08-30

Burke, Wallace R.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

Patent

active

D03500772

REFERENCES:
patent: D333444 (1993-07-01), Shejan
patent: D334350 (1993-03-01), Wang
patent: D338848 (1993-08-01), Shyan
patent: D344467 (1994-02-01), Hung

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