Hiroyuki Kokawa

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Sendai, JP

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Patents Grantslast 30 patents

Information Patent Grant
Friction stir tool
- Patent number 8,408,444
- Issue date Apr 2, 2013
- Hitachi, Ltd.
- Seunghwan Park
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Friction stir welding tool and friction stir welding apparatus
- Patent number 7,703,656
- Issue date Apr 27, 2010
- Hitachi, Ltd.
- Seung Hwan Park
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
FRICTION STIR TOOL
- Publication number 20130240607
- Publication date Sep 19, 2013
- Seunghwan Park
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
FRICTION STIR TOOL
- Publication number 20110062214
- Publication date Mar 17, 2011
- Seunghwan Park
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
Friction Stir Welding Tool and Friction Stir Welding Apparatus
- Publication number 20080128472
- Publication date Jun 5, 2008
- Seung Hwan Park
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR