Seiji Tonogai

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Patents Grantslast 30 patents

Information Patent Grant
Method of forming small through-holes in thin metal plate
- Patent number 5,200,025
- Issue date Apr 6, 1993
- Dainippon Screen Manufacturing Co. Ltd.
- Keiji Toei
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...