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Shigeru Toyoda
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Saitama-ken, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Adhesive composition for bonding a lining tube on to the internal s...
Patent number
5,993,581
Issue date
Nov 30, 1999
Tokyo Gas Co., Ltd.
Shigeru Toyoda
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Reversible lining tube for repairing an existing pipeline
Patent number
5,899,636
Issue date
May 4, 1999
Tokyo Gas Co. Ltd.
Shigeru Toyoda
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Suction system for use in a method of lining the internal surface o...
Patent number
5,888,302
Issue date
Mar 30, 1999
Tokyo Gas Co. Ltd.
Shigeru Toyoda
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Methods of lining the internal surface of a pipe
Patent number
5,873,390
Issue date
Feb 23, 1999
Tokyo Gas Co., Ltd.
Shinobu Satake
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Pipeline structure with a lining material, an end structure of said...
Patent number
5,857,494
Issue date
Jan 12, 1999
Tokyo Gas Kabushiki Kaisha
Katsuyoshi Tsukamoto
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Method of repairing an existing pipe
Patent number
5,855,712
Issue date
Jan 5, 1999
Tokyo Gas Co. Ltd.
Shigeru Toyoda
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Method of lining the internal surface of a pipe
Patent number
5,853,629
Issue date
Dec 29, 1998
Tokyo Gas Co., Ltd.
Shigeru Toyoda
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Methods of lining the internal surface of a pipe
Patent number
5,740,838
Issue date
Apr 21, 1998
Tokyo Gas Co., Ltd.
Shinobu Satake
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Methods of lining the internal surface of a pipe
Patent number
5,716,672
Issue date
Feb 10, 1998
Tokyo Gas Co., Ltd.
Shigeru Toyoda
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Method of lining the internal surface of a pipe
Patent number
5,700,405
Issue date
Dec 23, 1997
Tokyo Gas Co., Ltd.
Shigeru Toyoda
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Methods of lining the internal surface of a pipe
Patent number
5,667,841
Issue date
Sep 16, 1997
Tokyo Gas Co., Ltd.
Shigeru Toyoda
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Liquid injection apparatus for use in a method of lining the intern...
Patent number
5,632,818
Issue date
May 27, 1997
Tokyo Gas Co., Ltd.
Shigeru Toyoda
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Methods of lining the internal surface of a pipe
Patent number
5,609,186
Issue date
Mar 11, 1997
Tokyo Gas Co., Ltd.
Shinobu Satake
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Method for lining the internal surface of a pipe
Patent number
5,590,689
Issue date
Jan 7, 1997
Tokyo Gas Co. Ltd.
Shigeru Toyoda
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Method of lining an inner surface of a pipe
Patent number
5,447,664
Issue date
Sep 5, 1995
Tokyo Gas Co., Ltd.
Takanori Ito
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Non-digging tube reverse lining engineering method of conduit
Patent number
5,200,011
Issue date
Apr 6, 1993
Tokyo Gas Co., Ltd.
Minoru Imamura
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL