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Planocentric drive mechanism
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Patent number 5,211,611
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Issue date May 18, 1993
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American Power Equipment Company
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James B. Lammers
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Air compressor shroud
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Patent number 5,020,973
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Issue date Jun 4, 1991
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The Scott & Fetzer Company
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James B. Lammers
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Improved compressor crankshaft
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Patent number 4,915,594
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Issue date Apr 10, 1990
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Campbell Hausfeld/Scott Fetzer Company
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James B. Lammers
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Valve structure for a compressor
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Patent number 4,801,250
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Issue date Jan 31, 1989
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Campbell Hausfeld/Scott Fetzer Company
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James B. Lammers
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...