Gilbert N. Ravich

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Lawndale, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Refocusing wavelengths to a common focal plane for electrical trace...
- Patent number 6,653,851
- Issue date Nov 25, 2003
- Lomanoha Ventures
- Mario A. Cugini
- G01 - MEASURING TESTING
Information Patent Grant
Gem identification viewer
- Patent number 6,650,489
- Issue date Nov 18, 2003
- Gemological Institute of America, Inc.
- Gilbert N. Ravich
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Apparatus and method using photoelectric effect for testing electri...
- Patent number 6,369,591
- Issue date Apr 9, 2002
- ManiaTech Incorporated
- Mario A. Cugini
- G01 - MEASURING TESTING
Information Patent Grant
Apparatus and method using photoelectric effect for testing electri...
- Patent number 6,369,590
- Issue date Apr 9, 2002
- ManiaTech Incorporated
- Mario A. Cugini
- G01 - MEASURING TESTING
Information Patent Grant
Gem identification viewer
- Patent number 6,292,315
- Issue date Sep 18, 2001
- Gemological Institute of America, Inc.
- Gilbert N. Ravich
- G02 - OPTICS
Information Patent Grant
Method & apparatus for detecting fracture filled diamonds
- Patent number 5,811,817
- Issue date Sep 22, 1998
- Gilbert Norman Ravich
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
Refocusing wavelengths to a common focal plane for electrical trace...
- Publication number 20030034788
- Publication date Feb 20, 2003
- Mario A. Cugini
- G01 - MEASURING TESTING
Information Patent Application
Gem identification viewer
- Publication number 20020180952
- Publication date Dec 5, 2002
- Gilbert N. Ravich
- G01 - MEASURING TESTING
Information Patent Application
Gem identification viewer
- Publication number 20020008925
- Publication date Jan 24, 2002
- Gemological Institute of America, Inc.
- Gilbert N. Ravich
- G01 - MEASURING TESTING