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Monitoring probe for groundwater flow
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Patent number 5,339,694
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Issue date Aug 23, 1994
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The United States of America as represented by the United States Department o...
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Brian B. Looney
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G01 - MEASURING TESTING
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Ion-drag flowmeter
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Patent number 4,953,407
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Issue date Sep 4, 1990
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General Motors Corporation
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Gerard W. Malaczynski
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G01 - MEASURING TESTING
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Four-collector flux sensor
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Patent number 4,019,383
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Issue date Apr 26, 1977
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United Technologies Corporation
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Walter J. Wiegand
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G01 - MEASURING TESTING
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3683178
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Patent number 3,683,178
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Issue date Aug 8, 1972
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G01 - MEASURING TESTING