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Mitsutoshi Hayashi
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Yokohama, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Method of lining channels
Patent number
6,241,925
Issue date
Jun 5, 2001
Tokyo Gas Co., Ltd.
Mitsutoshi Hayashi
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Double walled pipe, jacking method and pipe end structure of leadin...
Patent number
6,109,305
Issue date
Aug 29, 2000
Kawasaki Steel Corp
Tomoya Fujimoto
E21 - EARTH DRILLING MINING
Information
Patent Grant
Double walled pipe, jacking method and pipe end structure of leadin...
Patent number
6,004,073
Issue date
Dec 21, 1999
Kawasaki Steel Corp
Tomoya Fujimoto
E21 - EARTH DRILLING MINING
Information
Patent Grant
Double walled pipe, jacking method and pipe end structure of leadin...
Patent number
5,615,976
Issue date
Apr 1, 1997
Kawasaki Steel Corp
Tomoya Fujimoto
E21 - EARTH DRILLING MINING
Information
Patent Grant
Fabrication method for a funnel liner
Patent number
5,611,979
Issue date
Mar 18, 1997
Tokyo Gas Co., Ltd.
Mitsutoshi Hayashi
E21 - EARTH DRILLING MINING
Information
Patent Grant
Method for injecting lubricant or back-filling material into a spac...
Patent number
5,527,135
Issue date
Jun 18, 1996
Kabushiki Kaisha Iseki Kaihatsu Koki
Mitsutoshi Hayashi
E21 - EARTH DRILLING MINING
Information
Patent Grant
Method for controlling the direction of a shield tunneling machine...
Patent number
5,501,548
Issue date
Mar 26, 1996
Tokyo Gas Co., Ltd.
Mitsutoshi Hayashi
E21 - EARTH DRILLING MINING
Information
Patent Grant
Method for injecting lubricant and filler in the pipe-jacking method
Patent number
5,484,232
Issue date
Jan 16, 1996
Tokyo Gas Company Ltd.
Mitsutoshi Hayashi
E21 - EARTH DRILLING MINING
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...