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Akifumi Yamamoto
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Takatsuki, JP
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last 30 patents
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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...