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Orifice wear compensation
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Patent number 4,337,668
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Issue date Jul 6, 1982
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Sun Gas Company
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Joseph E. Zupanick
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G01 - MEASURING TESTING
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Parallelogram structure
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Patent number 4,042,991
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Issue date Aug 23, 1977
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Suntech, Inc.
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Robert L. Macy
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Pumping two-phase fluids
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Patent number 3,936,214
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Issue date Feb 3, 1976
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Sun Oil Company
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Joseph E. Zupanick
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...