Toru Tsuboi

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Matsudo-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Manufacturing method for wear resistant sintered member, sintered v...
- Patent number 7,892,481
- Issue date Feb 22, 2011
- Hitachi Powdered Metals Co., Ltd.
- Tatsuaki Yoshihiro
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Valve seat for internal combustion engines
- Patent number 6,660,056
- Issue date Dec 9, 2003
- Hitachi Powdered Metals Co., Ltd.
- Koichiro Hayashi
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Sintered alloy having superb wear resistance and process for produc...
- Patent number 6,251,157
- Issue date Jun 26, 2001
- Hitachi Powdered Metals Co., Ltd.
- Yoshimasa Aoki
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...

Patents Applicationslast 30 patents

Information Patent Application
Manufacturing method for wear resistant sintered member, sintered v...
- Publication number 20070081914
- Publication date Apr 12, 2007
- Hitachi Powdered Metals Co., Ltd.
- Tatsuaki Yoshihiro
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
Sintered valve guide and manufacturing method thereof
- Publication number 20060032328
- Publication date Feb 16, 2006
- Katsunao Chikahata
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
Valve seat for internal combustion engines
- Publication number 20010037842
- Publication date Nov 8, 2001
- Koichiro Hayashi
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...