Tomoaki Arakawa

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Saitama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Production method for sintered gear
- Patent number 7,905,018
- Issue date Mar 15, 2011
- Hitachi Powdered Metals Co., Ltd.
- Junichi Ichikawa
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Sintered gear
- Patent number 7,556,864
- Issue date Jul 7, 2009
- Hitachi Powdered Metals Co., Ltd.
- Yuji Yamanishi
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Permanent magnet type rotor and method of manufacturing the rotor
- Patent number 7,151,334
- Issue date Dec 19, 2006
- Hitachi Powdered Metals Co., Ltd.
- Kazuo Asaka
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
Sintered gear and production method therefor
- Publication number 20070283778
- Publication date Dec 13, 2007
- Hitachi Powdered Metals Co., Ltd.
- Junichi Ichikawa
- B22 - CASTING POWDER METALLURGY
Information Patent Application
Sintered gear
- Publication number 20050272545
- Publication date Dec 8, 2005
- Yuji Yamanishi
- B22 - CASTING POWDER METALLURGY
Information Patent Application
Permanent magnet type rotor and method of manufacturing the rotor
- Publication number 20040025323
- Publication date Feb 12, 2004
- Kazuo Asaka
- H01 - BASIC ELECTRIC ELEMENTS