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Class Information
Number: 356/30
Name: Optics: measuring and testing > Crystal or gem examination
Description: Subject matter including a support for a crystal or gem for examination by visible light, a light source passing light through or reflecting light from the crystal or gem and usually structure to view, mark, or locate the light patterns correlated to some condition of the crystal or gem.

Sub-classes under this class:

Class Number Class Name Patents
356/31 Axes determination 29

Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8705018 Arrangement for and method of examining gemstones Apr. 22, 2014
8705805 Secure portable token and systems and methods for identification and authentication of the same Apr. 22, 2014
8593620 Device for measuring properties of scatterers , for color measuring for scattered light of gemstones, for measuring brightness of gemstones, and for measuring luminescence distribution Nov. 26, 2013
8553208 Retail compatible detection of CVD grown diamond Oct. 8, 2013
8514377 Detection of chemical vapor deposition grown diamond Aug. 20, 2013
8477293 Method and apparatus for rapidly cooling a gem, including two stage cooling Jul. 2, 2013
8441623 Method for detecting the diameter of a single crystal and single crystal pulling apparatus May. 14, 2013
8436986 Apparatus and methods for assessment, evaluation and grading of gemstones May. 7, 2013
8376566 Method and apparatus for object viewing, observation, inspection, identification, and verification Feb. 19, 2013
8317521 Computer-implemented method of and system for teaching an untrained observer to evaluate a gemstone Nov. 27, 2012
8289621 Reflected dark field method and apparatus Oct. 16, 2012
8270719 Gem pattern matching algorithm to determine the percentage match of a target gem pattern to a database of gem patterns Sep. 18, 2012
8239143 System and method for gemstone cut grading Aug. 7, 2012
8213000 Retail compatible detection of CVD grown diamond Jul. 3, 2012
8170277 Automatic tracking apparatus and automatic tracking method May. 1, 2012
8134694 Detection of chemical vapor deposition grown diamond Mar. 13, 2012
8120758 Fast UV-VIS-NIR absorption spectrometer system and method Feb. 21, 2012
8116552 Apparatus for generating data for determining a property of a gemstone and methods and computer programs for determining a property of a gemstone Feb. 14, 2012
8098368 Method for evaluation of a gemstone Jan. 17, 2012
8098369 Systems and methods for the evaluation of scintillation in gemstones Jan. 17, 2012
8095325 System and method for gemstone cut grading Jan. 10, 2012
8035807 Engraved gemstone viewer Oct. 11, 2011
8030077 Non-linear optical imaging of protein crystals Oct. 4, 2011
8023108 Crystallographic orientation measurement Sep. 20, 2011
7964417 Method of measuring degree of crystallinity of polycrystalline silicon substrate, method of fabricating organic light emitting display using the same, and organic light emitting display fabric Jun. 21, 2011
7955607 Method of evaluating evenness of suplatast tosilate crystal, even crystal, and process for producing the same Jun. 7, 2011
7931384 Method and apparatus for object viewing, observation, inspection, identification, and verification Apr. 26, 2011
7876424 Distance estimation based on image contrast Jan. 25, 2011
7800740 Method and apparatus for identifying and characterizing objects based on fluorescence Sep. 21, 2010
7800741 Method for evaluation of a gemstone Sep. 21, 2010
7755072 System and method for three-dimensional location of inclusions in a gemstone Jul. 13, 2010
7751034 Systems and methods for ray tracing Jul. 6, 2010
7701569 Dark field lighting testing device Apr. 20, 2010
7700381 Semiconductor wafer with ID mark, equipment for and method of manufacturing semiconductor device from them Apr. 20, 2010
7688444 Method of determining laser stabilities of optical materials, crystals selected according to said method, and uses of said selected crystals Mar. 30, 2010
7652755 Apparatus and method for color measurement and color grading of diamonds, gemstones and the like Jan. 26, 2010
7626700 Mosaic quantification by birefringence measurement Dec. 1, 2009
7586588 Correlation operation method, correlation operation device, focus detection device and imaging device Sep. 8, 2009
7580118 Methods, apparatus, and systems for evaluating gemstones Aug. 25, 2009
7571060 System and method for gemstone cut grading Aug. 4, 2009
7515251 Fluorescence measuring device for gemstones Apr. 7, 2009
7468786 Engraved gemstone viewer Dec. 23, 2008
7436497 Apparatus and method for providing spot lighting for gemstone observation Oct. 14, 2008
7436498 Apparatus for determining the shape of a gemstone Oct. 14, 2008
7433025 Automated protein crystallization imaging Oct. 7, 2008
7426019 Method and arrangement for non-destructive composition analysis of delicate samples Sep. 16, 2008
7420657 Methods, apparatus, and systems for evaluating gemstones Sep. 2, 2008
7414709 Method and system for online evaluation of gemstones Aug. 19, 2008
7411663 Apparatus for generating data for determining a property of a gemstone Aug. 12, 2008
7388656 Method and system for color grading of gemstones Jun. 17, 2008

1 2 3 4 5

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