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Hydraulic device
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Patent number 6,893,231
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Issue date May 17, 2005
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Innas Free Piston, B.V.
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Peter A. J. Achten
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Hydraulic installations
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Patent number 6,575,076
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Issue date Jun 10, 2003
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Innas Free Piston B.V.
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Peter A. J. Achten
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Pressure transformer
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Patent number 6,116,138
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Issue date Sep 12, 2000
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Innas Free Piston B.V.
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Peter A. J. Achten
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Free-piston engine
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Patent number 5,829,393
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Issue date Nov 3, 1998
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Innas Free Piston, B.V.
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Peter Augustinus Johannes Achten
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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