Refractometer

Details Refractometer Refractometer

1990-06-22

1992-06-16

Walsh, Donald P.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Food preparation type

D10 75, D24172

Patent

active

D03270246

REFERENCES:
patent: D138401 (1944-08-01), Stegeman
patent: D285485 (1986-09-01), Kahute
patent: D296004 (1988-05-01), Kahute
patent: D316144 (1991-04-01), Nishimura
patent: D320077 (1991-09-01), Koizumi
patent: 4571842 (1986-02-01), Ikezawa et al.
Nidek Autorefractometer Model:AR-1100, Nidek Co., Ltd, undated, pp. 1-4.
Canon Auto Ref R-22, Canon Inc., undated, pp. 1-6.
Topcon Auto-Refractometer RM-A2000, Tokyo Optical Co., Ltd, 1988 ?, pp. 1-6.

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