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1974-09-18 |
1976-04-08 |
Dihaco Diamanten Handels Co |
Verfahren und vorrichtung zur ermittlung und groessenbestimmung von einschluessen in edelsteinen
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GB1566325A
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1976-02-05 |
1980-04-30 |
Dihaco Diamanten Handels Co |
Process and apparatus for ascertaining data relating to the valuation of gems
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1976-05-20 |
1978-11-30 |
Alusuisse |
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1978-07-28 |
1981-05-12 |
Gem Instruments Corporation |
Apparatus for visually duplicating gemstones
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1978-10-09 |
1983-09-30 |
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Method of assessing the colour of gems
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1979-10-03 |
1981-09-29 |
Scientific Gem Identification, Inc. |
Apparatus for determining the color characteristics of a gem
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1980-06-04 |
1983-11-29 |
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Centering and working gemstones
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1980-06-04 |
1982-07-28 |
Gersan Ets |
Centering and working gemstones
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1980-06-17 |
1981-12-23 |
GRETAG Aktiengesellschaft |
Verfahren und Vorrichtung zur maschinellen Identifikation von Edelsteinen
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1981-03-22 |
1982-09-27 |
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Identifying method for jewelry by measurement of optical system and data processor for it
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1981-03-25 |
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Identifying method of jewel and ornament by measurement of quantity system and optical system, and its data processor
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1981-04-12 |
1982-10-19 |
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Examining method for jewel
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1981-06-25 |
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Shimadzu Corp |
ダイヤモンドカラ−測定装置
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1985-12-20 |
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1986-06-09 |
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Illuminatore per l osservazione spettroscopica di minerali gemme osimili
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1989-12-19 |
1992-12-11 |
Europ Propulsion |
Dispositif d'observation pour corps exterieurement brillants de forme generale spherique ou courbe.
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1990-02-06 |
1991-10-15 |
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1990-07-06 |
1994-12-14 |
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1992-05-19 |
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Method and apparatus for examining an object
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1992-05-29 |
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Nikon Corp |
形状計測装置
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1997-01-10 |
1999-10-12 |
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System and method for computerized evaluation of gemstones
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2000-02-16 |
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Systems, apparatuses and methods for diamond color measurement and analysis
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2000-09-29 |
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System and methods for evaluating the appearance of a gemstone
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2001-10-23 |
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Dji Design |
Article de bijouterie illuminable comportant une pierre transparente a la lumiere, et procede d'illumination de celle-ci
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2004-09-07 |
Overseas Diamonds Inc. |
Computer-implemented method of and system for teaching an untrained observer to evaluate a gemstone
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Fluorescence measuring device for gemstones
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Galatea Ltd. |
Verfahren zum Bestimmen des Wertes eines Objekts
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Method for evaluation of a gemstone
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Assessment of diamond color
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2006-12-07 |
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Single channel memory mirror
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2008-03-11 |
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Apparatus, a method, and a system for gemstone evaluation and gemology tutoring over the internet
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2012-10-03 |
2014-08-28 |
Presidium Instr Pte Ltd |
A gemstone tester and a method of characterising a gemstone
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Anordnung zur Analyse eines durch Brechung und Reflexion an einem Schmuckstein hervorgerufenen Lichtmusters
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2017-01-27 |
2019-05-28 |
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Spherical articulating fixture
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2017-12-21 |
2024-02-20 |
Università Degli Studi Di Milano - Bicocca |
Systems and methods for spectroscopic analyses of diamonds
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2020-08-18 |
2022-05-17 |
Hong Kong Applied Science And Technology Research Institute Co., Ltd. |
Apparatus and method for visually inspecting gemstones
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Metodo e dispositivo per identificare univocamente una pietra preziosa sfaccettata
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