Yoshihisa Maeda

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Tsuchiura, JP

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Patents Grantslast 30 patents

Information Patent Grant
Laser narrow groove welding apparatus and welding method
- Patent number 8,481,885
- Issue date Jul 9, 2013
- Hitachi Plant Technologies, Ltd.
- Takeshi Tsukamoto
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Welding method and welding apparatus for an impeller
- Patent number 8,426,766
- Issue date Apr 23, 2013
- Hitachi Plant Technologies, Ltd.
- Takeshi Tsukamoto
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Welding slot sealing structure and welding method
- Patent number 8,408,873
- Issue date Apr 2, 2013
- Hitachi Plant Technologies, Ltd.
- Masaaki Iwasa
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
LASER NARROW GROOVE WELDING APPARATUS AND WELDING METHOD
- Publication number 20100326969
- Publication date Dec 30, 2010
- Hitachi Plant Technologies, Ltd.
- Takeshi TSUKAMOTO
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
WELDING METHOD AND WELDING APPARATUS FOR AN IMPELLER
- Publication number 20090095719
- Publication date Apr 16, 2009
- Takeshi Tsukamoto
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
WELDING SLOT SEALING STRUCTURE AND WELDING METHOD
- Publication number 20080237195
- Publication date Oct 2, 2008
- Masaaki Iwasa
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR