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Paul M. Raccah
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Chicago, IL, US
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last 30 patents
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Patent Grant
Apparatus for determining the color characteristics of a gem
Patent number
4,291,975
Issue date
Sep 29, 1981
Scientific Gem Identification, Inc.
Paul M. Raccah
G01 - MEASURING TESTING
Information
Patent Grant
Method of manufacturing a gas sensor
Patent number
4,221,827
Issue date
Sep 9, 1980
The United States of America as represented by the Secretary of the Interior
John M. Parry
G01 - MEASURING TESTING
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Patent Grant
Method and apparatus for measuring variations in composition in bin...
Patent number
4,142,802
Issue date
Mar 6, 1979
Yeshiva University
Fred H. Pollak
G01 - MEASURING TESTING