Takefumi Ohwada

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Katsuta, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of combining plurality of parts and structure of plurality o...
- Patent number 4,815,195
- Issue date Mar 28, 1989
- Hitachi, Ltd.
- Kazuhiro Tsuruoka
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...