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Gemstone viewer
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Patent number 9,625,393
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Issue date Apr 18, 2017
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De Beers UK Ltd.
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James Gordon Charters Smith
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G01 - MEASURING TESTING
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Gemstone viewer
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Patent number 9,188,542
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Issue date Nov 17, 2015
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De Beers UK Ltd.
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James Gordon Charters Smith
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G01 - MEASURING TESTING
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High crystalline quality synthetic diamond
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Patent number 9,133,566
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Issue date Sep 15, 2015
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Element Six Technologies Limited
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Daniel James Twitchen
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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Marking diamond
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Patent number 6,358,427
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Issue date Mar 19, 2002
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Gersan Establishment
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James Gordon Charters Smith
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B44 - DECORATIVE ARTS
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Cutting using high energy radiation
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Patent number 5,194,711
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Issue date Mar 16, 1993
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Anstalt Gersan
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Michael P. Gaukroger
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR