Analytic colormetric instrument

Details Analytic colormetric instrument Analytic colormetric instrument

1988-09-16

1991-05-14

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Chemical

Patent

active

D03168263

REFERENCES:
patent: D185543 (1959-06-01), Frank
patent: D186271 (1959-10-01), Marks
patent: D250834 (1979-01-01), Ruppart
patent: D256567 (1980-08-01), Voss et al.
patent: 1675967 (1928-07-01), Zitkowski
patent: 3381572 (1968-05-01), Tuwiner
patent: 3488156 (1970-01-01), Good et al.
patent: 3591805 (1971-07-01), Schoeffel
patent: 4956302 (1990-09-01), Gordon et al.

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