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Vacuum pumping apparatus
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Patent number 5,088,895
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Issue date Feb 18, 1992
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The Hilliard Corporation
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Paul D. Webb
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Oil distributing means
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Patent number 4,276,960
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Issue date Jul 7, 1981
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Ingersoll-Rand Company
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Paul D. Webb
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Oil supply means for a machine
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Patent number 4,262,775
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Issue date Apr 21, 1981
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Ingersoll-Rand Company
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Paul D. Webb
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Thrust piston biasing means
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Patent number 4,180,089
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Issue date Dec 25, 1979
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Ingersoll-Rand Company
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Paul D. Webb
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Gas compressor system
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Patent number 4,073,607
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Issue date Feb 14, 1978
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Ingersoll-Rand Company
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Paul D. Webb
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Positive-displacement, fluid machine
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Patent number 4,068,988
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Issue date Jan 17, 1978
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Ingersoll-Rand Company
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Paul Dale Webb
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Gas compressor unloading means
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Patent number 4,059,368
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Issue date Nov 22, 1977
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Ingersoll-Rand Company
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Wallace A. McGahan
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Fluid seal
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Patent number 4,050,701
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Issue date Sep 27, 1977
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Ingersoll-Rand Company
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Paul Dale Webb
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Gas compressor unloading means
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Patent number 3,989,413
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Issue date Nov 2, 1976
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Ingersoll-Rand Company
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Wallace A. McGahan
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...