Hideo Maruyama

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Osaka, JP

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Patents Grantslast 30 patents

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...
Information Patent Grant
Apparatus for lining pipe lines including liquid seal means
- Patent number 4,948,452
- Issue date Aug 14, 1990
- Tokyo Gas Co., Ltd.
- Akio Morinaga
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Method for lining pipe lines with a pressurized gas
- Patent number 4,883,557
- Issue date Nov 28, 1989
- Tokyo Gas Co., Ltd.
- Akio Morinaga
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...