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Ryozo Ariizumi

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Patents Grantslast 30 patents

  • Information Patent Grant

    Pneumatically-operated valve
    • Patent number 4,903,939
    • Issue date Feb 27, 1990
    • Fujikura Rubber, Ltd.
    • Ryozo Ariizumi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Diaphragm type of pilot operated directional control valve
    • Patent number 4,875,500
    • Issue date Oct 24, 1989
    • Fujikura Rubber Ltd.
    • Ryozo Ariizumi
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Pneumatically-operated valve
    • Patent number 4,840,347
    • Issue date Jun 20, 1989
    • Fujikura Rubber, Ltd.
    • Ryozo Ariizumi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Diaphragm type of pilot operated directional control valve
    • Patent number 4,823,834
    • Issue date Apr 25, 1989
    • Fujikura Rubber Ltd.
    • Ryozo Ariizumi
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Directional control valve
    • Patent number 4,765,370
    • Issue date Aug 23, 1988
    • Fujikura Rubber Ltd.
    • Ryozo Ariizumi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Diaphragm type of pilot operated directional control valve
    • Patent number 4,744,388
    • Issue date May 17, 1988
    • Fujikura Rubber Ltd.
    • Ryozo Ariizumi
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Pneumatically operated valve
    • Patent number 4,712,576
    • Issue date Dec 15, 1987
    • Fujikura Rubber Limited
    • Ryozo Ariizumi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...