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Solenoid valve and method for its manufacture
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Patent number 5,911,400
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Issue date Jun 15, 1999
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Hydraulik-Ring Antriebs- und Steuerungstechnik GmbH
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Bernd Niethammer
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Apparatus for tensioning of a cam shaft drive
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Patent number 5,597,367
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Issue date Jan 28, 1997
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Hydraulik-Ring Antriebs- und Steuerungstechnik GmbH
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Alfred Trzmiel
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Electroproportional solenoid valve unit
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Patent number 5,592,972
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Issue date Jan 14, 1997
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Hydraulik-Ring Antriebs- und Steuerungstechnik GmbH
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Bernd Niethammer
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F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
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Proportional magnet valve
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Patent number 5,322,259
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Issue date Jun 21, 1994
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Hydraulik-Ring Antriebs- und Steuerungstechnik GmbH
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Axel Sauer
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Clutch for vehicles
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Patent number 5,301,781
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Issue date Apr 12, 1994
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Hydraulik-Ring Antriebs- und Steuerungstechnik GmbH
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Dieter Tischer
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...