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Akio Morinaga
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Fujisawa, JP
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last 30 patents
Information
Patent Grant
Lining material for pipelines
Patent number
5,164,237
Issue date
Nov 17, 1992
Tokyo Gas Kabushiki Kaisha
Shigeo Kaneda
B32 - LAYERED PRODUCTS
Information
Patent Grant
Lining material for pipelines
Patent number
5,077,107
Issue date
Dec 31, 1991
Tokyo Gas Kabushiki Kaisha
Shigeo Kaneda
B32 - LAYERED PRODUCTS
Information
Patent Grant
Method for lining pipe lines
Patent number
4,956,038
Issue date
Sep 11, 1990
Tokyo Gas Kabushiki Kaisha
Akio Morinaga
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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...
Information
Patent Grant
Boring device for opening passages to branch portions of a lined ma...
Patent number
4,882,470
Issue date
Nov 21, 1989
Tokyo Gas Kabushiki Kaisha
Katsuaki Zenbayashi
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Lining material for pipe lines
Patent number
4,877,665
Issue date
Oct 31, 1989
Tokyo Gas Kabushiki Kaisha
Kumao Higuchi
D03 - WEAVING
Information
Patent Grant
Tubular lining material for pipe line
Patent number
4,684,556
Issue date
Aug 4, 1987
Tokyo Gas Co., Ltd.
Hisao Ohtsuga
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
System for repairing joints in pipes laid underground
Patent number
4,584,963
Issue date
Apr 29, 1986
Tokyo Gas Co., Ltd.
Akio Morinaga
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Tubular lining material for pipe lines having bends
Patent number
4,576,205
Issue date
Mar 18, 1986
Tokyo Gas Co., Ltd.
Akio Morinaga
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Method for providing the inner surface of a pipe with a flexible tu...
Patent number
4,368,091
Issue date
Jan 11, 1983
Tokyo Gas Co. Ltd.
Hisao Ontsuga
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Method and apparatus for providing the inner surface of a pipe line...
Patent number
4,350,548
Issue date
Sep 21, 1982
Tokyo Gas Co., Ltd.
Katsuaki Zenbayashi
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Method for smoothly evaginating a tubular material under pressure
Patent number
4,334,943
Issue date
Jun 15, 1982
Tokyo Gas Kabushiki Kaisha
Katsuaki Zenbayashi
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL