Refractometer
Description
FIG. 1 is a right side elevation of a refractometer, showing my new design;
FIG. 2 is a left side elevation thereof;
FIG. 3 is a front elevation thereof;
FIG. 4 is a rear elevation thereof; and
FIG. 5 is a top plan view thereof.
Referenced Cited
Patent History
Patent number: D253909
Type: Grant
Filed: Jul 8, 1977
Date of Patent: Jan 8, 1980
Assignee: American Optical Corporation (Southbridge, MA)
Inventor: John T. Armbruster (Niagara Falls, NY)
Primary Examiner: Bernard Ansher
Attorney: Howard R. Berkenstock
Application Number: 5/813,909
Type: Grant
Filed: Jul 8, 1977
Date of Patent: Jan 8, 1980
Assignee: American Optical Corporation (Southbridge, MA)
Inventor: John T. Armbruster (Niagara Falls, NY)
Primary Examiner: Bernard Ansher
Attorney: Howard R. Berkenstock
Application Number: 5/813,909
Classifications
Current U.S. Class:
D24/17;
D24/8
International Classification: D2401;
International Classification: D2401;