Yoshiaki Fujita

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Saitama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Assembled cam shaft
- Patent number 5,007,956
- Issue date Apr 16, 1991
- Nippon Piston Ring Co., Ltd.
- Yoshiaki Fujita
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Ultrasonic joint inspection device and method
- Patent number 4,891,972
- Issue date Jan 9, 1990
- Nippon Piston Ring Co., Ltd.
- Takashi Kawaguchi
- G01 - MEASURING TESTING
Information Patent Grant
Method and device for examination of a joint of a ultrasonic joint...
- Patent number 4,817,420
- Issue date Apr 4, 1989
- Nippon Piston Ring Co., Ltd.
- Takashi Kawaguchi
- G01 - MEASURING TESTING
Information Patent Grant
Hollow cam shaft
- Patent number 4,730,581
- Issue date Mar 15, 1988
- Nippon Piston Ring Co., Ltd.
- Yoshiaki Fujita
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Sintered alloy having improved wear resistance property
- Patent number 4,696,696
- Issue date Sep 29, 1987
- Nippon Piston Ring Co., Ltd.
- Yoshiaki Fujita
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method of manufacturing a hollow cam shaft
- Patent number 4,612,695
- Issue date Sep 23, 1986
- Nippon Piston Ring Co., Ltd.
- Genkichi Umeha
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...