David Fisher

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Berkshire, GB

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Patents Grantslast 30 patents

Information Patent Grant
Gemstone sorting
- Patent number 11,541,429
- Issue date Jan 3, 2023
- De Beers UK Ltd.
- Andrew John Portsmouth
- G01 - MEASURING TESTING
Information Patent Grant
Luminescence measurements in diamond
- Patent number 10,345,245
- Issue date Jul 9, 2019
- De Beers UK Ltd.
- James Gordon Charters Smith
- G01 - MEASURING TESTING
Information Patent Grant
Luminescence measurements in diamond
- Patent number 10,082,469
- Issue date Sep 25, 2018
- De Beers UK Ltd.
- James Gordon Charters Smith
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
GEMSTONE SORTING
- Publication number 20200094289
- Publication date Mar 26, 2020
- DE BEERS UK LTD
- Andrew John Portsmouth
- B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
Information Patent Application
LUMINESCENCE MEASUREMENTS IN DIAMOND
- Publication number 20190003980
- Publication date Jan 3, 2019
- De Beers UK Ltd
- James Gordon Charters SMITH
- G01 - MEASURING TESTING
Information Patent Application
Automated FTIR Spectrometer
- Publication number 20180284030
- Publication date Oct 4, 2018
- Luke Michael Smith
- G01 - MEASURING TESTING
Information Patent Application
LUMINESCENCE MEASUREMENTS IN DIAMOND
- Publication number 20180195970
- Publication date Jul 12, 2018
- De Beers UK Ltd
- James Gordon Charters SMITH
- G01 - MEASURING TESTING
Information Patent Application
INFRA-RED ANALYSIS OF DIAMONDS
- Publication number 20150112643
- Publication date Apr 23, 2015
- DE BEERS CENTENARY AG
- Rizwan Khan
- G01 - MEASURING TESTING