Combination clock and smoke detector

Details Combination clock and smoke detector Combination clock and smoke detector

1991-12-13

1994-08-16

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Clock or clock case

Combined

D10106

Patent

active

D03496520

REFERENCES:
patent: D102763 (1937-01-01), Rainbault
patent: D208802 (1967-10-01), Laylon
patent: D262952 (1982-02-01), Hanig
patent: D279769 (1985-07-01), Thornton
patent: D319022 (1991-08-01), Hirota
patent: 4090178 (1978-05-01), Norris
patent: 4796015 (1989-01-01), Admire
patent: 4949077 (1990-08-01), Mbuthia

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