Color comparator

Details Color comparator Color comparator

1989-07-24

1992-05-05

Dunkins, Bruce W.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Chemical

Patent

active

D03258815

REFERENCES:
patent: D316826 (1991-05-01), Neuman
patent: 1389836 (1921-09-01), Mooney
patent: 1495763 (1924-05-01), Simpson et al.
patent: 1675967 (1928-07-01), Zitkowski
patent: 3773425 (1973-11-01), Bentley
patent: 4073623 (1978-02-01), Bodart

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