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Browse by Category: Main > Optical & Optics
Class Information
Number: 356/423
Name: Optics: measuring and testing > By shade or color > With reflective multicolor chart or standard > Plate > Disk
Description: Subject matter wherein the surfaces are disks or sectors which form disks.

Patents under this class:

Patent Number Title Of Patent Date Issued
8603772 Particle sensor with wide linear range Dec. 10, 2013
8467060 Colour image reference system for monitor and projector images Jun. 18, 2013
7561735 System and process for identifying, choosing and matching colors Jul. 14, 2009
7550700 Light-receiving semiconductor device and optical pickup device Jun. 23, 2009
7034943 Gas sensors Apr. 25, 2006
6271920 Methods and apparatus for color calibration and verification Aug. 7, 2001
6139325 Device for determining color combinations Oct. 31, 2000
6067504 Method for correctly identifying hair color May. 23, 2000
5875027 Sensitivity calibration disk for surface defect tester Feb. 23, 1999
5717605 Color classification apparatus Feb. 10, 1998
5526120 Test strip with an asymmetrical end insuring correct insertion for measuring Jun. 11, 1996
5515170 Analyte detection device having a serpentine passageway for indicator strips May. 7, 1996
5452081 Texture matching device Sep. 19, 1995
5402362 Method of utilize trial dyeings to improve color formulations Mar. 28, 1995
5231576 Measuring apparatus Jul. 27, 1993
5160980 Test piece coloration comparative decision unit Nov. 3, 1992
5160979 Test piece coloration comparative decision unit Nov. 3, 1992
5011290 Test sample color comparison device Apr. 30, 1991
4989983 Test sample color comparison device Feb. 5, 1991
4984895 Color comparison device having a bulged insertion groove for holding a test stick in a flexed condition Jan. 15, 1991
4981361 Color comparison device having a color sample-bonding wheel which permits easy removal of a color sample sticker Jan. 1, 1991
4966461 Color identification system Oct. 30, 1990
4871258 Color test meter Oct. 3, 1989
4112594 Color coordinating implement Sep. 12, 1978
3967212 Flash lamp pumped dye laser Jun. 29, 1976

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