Refractometer

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Description

FIG. 1 is a perspective view of a refractometer.

FIG. 2 is a right side elevational view of the invention.

FIG. 3 is a left side elevational view of the invention.

FIG. 4 is a top plan view of the invention.

FIG. 5 is a bottom plan view of the invention.

FIG. 6 is a front elevational view of the invention; and,

FIG. 7 is a rear elevational view of the invention.

Claims

The ornamental design for a refractometer, as shown and described.

Referenced Cited
U.S. Patent Documents
2383347 August 1945 Silge
4890916 January 2, 1990 Rainer
D348849 July 19, 1994 Thompson
5355211 October 11, 1994 Thompson et al.
5455645 October 3, 1995 Berger et al.
5563737 October 8, 1996 Kamrat
6149591 November 21, 2000 Henderson et al.
6195160 February 27, 2001 Rainer et al.
Patent History
Patent number: D511980
Type: Grant
Filed: Apr 19, 2004
Date of Patent: Nov 29, 2005
Inventors: Guy E. McFarland (Kirkland, WA), Paul J. Wendling (Bellevue, WA), Mui Hing Hok (#1002 Tianhe, Guangzhou)
Primary Examiner: Antoine D. Davis
Attorney: Dean A. Craine
Application Number: 29/203,729
Classifications
Current U.S. Class: Provided With Handle, Or Hand-held (D10/78)