Indoor chimes

Details Indoor chimes Indoor chimes

1991-04-22

1993-02-02

Burke, Wallace R.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

D11141

Patent

active

D03329240

REFERENCES:
patent: D250455 (1978-12-01), Mohrhauser
patent: D258809 (1981-04-01), Halburian
patent: D279873 (1985-07-01), Neely
patent: D285669 (1986-09-01), Brockmann
patent: D317419 (1991-06-01), Ronzheimer
patent: D324000 (1992-02-01), Kvistad

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