Gumpei Yokoyama

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Existing pipe cut-off method, existing pipe slitting method, piping...
- Patent number 6,530,389
- Issue date Mar 11, 2003
- Suiken Co., Ltd.
- Toshiyuki Sato
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Existing pipe cut-off method, existing pipe slitting method, piping...
- Patent number 6,470,907
- Issue date Oct 29, 2002
- Suiken Co., Ltd.
- Toshiyuki Sato
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...