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Takaichi Koyama
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Hitachi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Method of repairing housing of control rod driving system
Patent number
4,440,339
Issue date
Apr 3, 1984
Hitachi, Ltd.
Yasumasa Tamai
G21 - NUCLEAR PHYSICS NUCLEAR ENGINEERING
Information
Patent Grant
Method and system for inspection of inside of nuclear reactor vessel
Patent number
4,311,556
Issue date
Jan 19, 1982
Hitachi, Ltd.
Taro Iwamoto
B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information
Patent Grant
Method of correcting distorted pipe end
Patent number
4,262,517
Issue date
Apr 21, 1981
Hitachi, Ltd.
Hideaki Kamohara
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Grant
Method for controlling an automatic pipe welder
Patent number
4,144,992
Issue date
Mar 20, 1979
Hitachi, Ltd.
Tsutomu Omae
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR