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Mark W. Grenfell
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Woodbury, MN, US
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Patents Grants
last 30 patents
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Patent Grant
Detection medium and method for use in hermetic seal testing
Patent number
5,369,983
Issue date
Dec 6, 1994
Minnesota Mining and Manufacturing Company
Mark W. Grenfell
G01 - MEASURING TESTING
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last 30 patents
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Patent Application
Use of fluorinated ketones as test fluids in the testing of electro...
Publication number
20030007543
Publication date
Jan 9, 2003
3M Innovative Properties Company
Mark W. Grenfell
G01 - MEASURING TESTING