Masaru Yamakawa

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Hyogo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of constructing information correspondence pipe, constructed...
- Patent number 7,341,403
- Issue date Mar 11, 2008
- Sanki Engineering Co., Ltd.
- Fumiaki Tsuchiya
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Boring device for lining material in branched portions of lined con...
- Patent number 5,197,540
- Issue date Mar 30, 1993
- Ashimori Kogyo Kabushiki Kaisha
- Isaburo Yagi
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
Method of constructing information correspondence pipe, constructed...
- Publication number 20040253057
- Publication date Dec 16, 2004
- Fumiaki Tsuchiya
- G02 - OPTICS