Masaaki Ishiguri

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Katsuta, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of producting an electric contact
- Patent number 4,821,412
- Issue date Apr 18, 1989
- Hitachi, Ltd.
- Tatsuhiro Tani
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...