Masao Kojima

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Tokyo, JP

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Patents Grantslast 30 patents

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
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