Hiroshi Hada

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Numazu, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method for forming a through-hole through the circumferential wall...
- Patent number 6,098,441
- Issue date Aug 8, 2000
- USUI Kokusai Sangyo Kaisha Ltd.
- Hiroshi Hada
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...