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Animal waste pumping system
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Patent number 4,445,823
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Issue date May 1, 1984
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Acorn Equipment Corp.
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Ronald L. Zyduck
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Manure transfer system having a pull pump
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Patent number 4,439,115
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Issue date Mar 27, 1984
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Butler Manufacturing Company
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Clinton A. Nesseth
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Material handling system
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Patent number 3,981,635
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Issue date Sep 21, 1976
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Hedlund Manufacturing Co., Inc.
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Junior M. Hedlund
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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3872981
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Patent number 3,872,981
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Issue date Mar 25, 1975
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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3687311
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Patent number 3,687,311
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Issue date Aug 29, 1972
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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3685059
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Patent number 3,685,059
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Issue date Aug 22, 1972
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2486617
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Patent number 2,486,617
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Issue date Nov 1, 1949
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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2307160
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Patent number 2,307,160
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Issue date Jan 5, 1943
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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2058455
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Patent number 2,058,455
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Issue date Oct 27, 1936
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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1830257
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Patent number 1,830,257
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Issue date Nov 3, 1931
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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1667179
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Patent number 1,667,179
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Issue date Apr 24, 1928
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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1624702
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Patent number 1,624,702
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Issue date Apr 12, 1927
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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1599889
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Patent number 1,599,889
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Issue date Sep 14, 1926
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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1558609
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Patent number 1,558,609
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Issue date Oct 27, 1925
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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1528559
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Patent number 1,528,559
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Issue date Mar 3, 1925
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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1406885
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Patent number 1,406,885
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Issue date Feb 14, 1922
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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1370506
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Patent number 1,370,506
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Issue date Mar 8, 1921
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...