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Gas density meter and method
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Patent number 5,307,668
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Issue date May 3, 1994
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Badger Meter, Inc.
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William H. Vander Heyden
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G01 - MEASURING TESTING
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Double wing vortex flowmeter
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Patent number 5,247,838
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Issue date Sep 28, 1993
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Badger Meter, Inc.
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William H. Vander Heyden
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G01 - MEASURING TESTING
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Sonic measurement of gas flow
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Patent number 4,663,977
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Issue date May 12, 1987
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Badger Meter, Inc.
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William H. Vander Heyden
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G01 - MEASURING TESTING
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Ultrasonic flow meter
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Patent number 4,052,896
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Issue date Oct 11, 1977
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Badger Meter, Inc.
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Bock W. Lee
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G01 - MEASURING TESTING
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Open channel flow meter
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Patent number 3,996,798
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Issue date Dec 14, 1976
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Badger Meter, Inc.
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William H. Vander Heyden
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G01 - MEASURING TESTING