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Proportional valve
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Patent number 4,790,345
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Issue date Dec 13, 1988
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Parker-Hannifin Corporation
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Abel E. Kolchinsky
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Self-pressure regulating proportional valve
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Patent number 4,725,039
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Issue date Feb 16, 1988
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Clevite Industries, Inc.
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Abel E. Kolchinsky
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Hydraulic solenoid valve structure
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Patent number 4,611,632
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Issue date Sep 16, 1986
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Imperial Clevite Inc.
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Abel E. Kolchinsky
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F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
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Solenoid valve
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Patent number 4,540,154
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Issue date Sep 10, 1985
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Imperial Clevite Inc.
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Abel E. Kolchinsky
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Solenoid valve
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Patent number 4,526,340
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Issue date Jul 2, 1985
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Imperial Clevite Inc.
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Abel E. Kolchinsky
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Retaining ring locking device
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Patent number 4,405,251
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Issue date Sep 20, 1983
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Miller Fluid Power Corporation
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Abel E. Kolchinsky
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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