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Hydraulic gravity ram pump
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Patent number 8,932,030
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Issue date Jan 13, 2015
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McNichol, Richard Frederick
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Richard F. McNichol
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Hydraulic gravity ramp pump
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Patent number 8,535,017
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Issue date Sep 17, 2013
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Richard F. McNichol
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Hydraulic gravity ram pump
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Patent number 7,967,578
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Issue date Jun 28, 2011
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Richard Frederick McNichol
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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1½ Piston force pump
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Patent number 6,193,476
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Issue date Feb 27, 2001
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Gerald T. Sweeney
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Sampling pump with packer
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Patent number 5,238,060
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Issue date Aug 24, 1993
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OED Environmental Systems, Inc.
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K. Lynn Niehaus
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E21 - EARTH DRILLING MINING
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Submersible pneumatic pump for water table
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Patent number 5,013,218
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Issue date May 7, 1991
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Sigma Enterprises, Inc.
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Larry K. Spencer
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Piston and valve assembly
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Patent number 4,544,335
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Issue date Oct 1, 1985
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George K. Roeder
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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3905745
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Patent number 3,905,745
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Issue date Sep 16, 1975
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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3877447
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Patent number 3,877,447
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Issue date Apr 15, 1975
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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3862624
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Patent number 3,862,624
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Issue date Jan 28, 1975
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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3861367
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Patent number 3,861,367
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Issue date Jan 21, 1975
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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3758238
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Patent number 3,758,238
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Issue date Sep 11, 1973
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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3618576
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Patent number 3,618,576
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Issue date Nov 9, 1971
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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3559402
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Patent number 3,559,402
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Issue date Feb 2, 1971
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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3368345
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Patent number 3,368,345
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Issue date Feb 13, 1968
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS