Hand-held refractometer

Details Hand-held refractometer Hand-held refractometer

1993-04-02

1994-07-19

Douglas, Alan P.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Electrical property

Patent

active

D03488497

REFERENCES:
patent: D299318 (1989-01-01), Chiang
patent: 4037967 (1977-07-01), Schweizer et al.
patent: 4243321 (1981-01-01), Okuda et al.
patent: 4650323 (1987-03-01), Nakagawa
patent: 4890916 (1990-01-01), Rainer
Cole-Palmer; Hand-Held Refractometers, 02940-46, 02940-30, 02940-15, 02940-10, 02940-40; .COPYRGT.1991; p. 828; Found in A.U. 2903 Ex. Davis's Ref. Collection.
"Hand-Held Refractomerters", Leica Inc. Feb. 1991. Brochure.

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