Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUSD253909 S
Publication typeGrant
Application numberUS 05/813,909
Publication dateJan 8, 1980
Filing dateJul 8, 1977
Publication number05813909, 813909, US D253909 S, US D253909S, US-S-D253909, USD253909 S, USD253909S
InventorsJohn T. Armbruster
Original AssigneeAmerican Optical Corporation
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US D253909 S
Abstract  available in
Previous page
Next page
  1. The ornamental design for a refractometer, as shown and described.

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.

U.S. ClassificationD24/172