Yosimitu Yamaguchi

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Chita-gun, JP

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Patents Grantslast 30 patents

Information Patent Grant
Roll forming method for forming flat tube and roll forming apparatu...
- Patent number 5,875,668
- Issue date Mar 2, 1999
- Denso Corporation
- Hisashi Kobayashi
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...