Tsukasa Ikegami

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of improving residual stress in circumferential weld zone
- Patent number 4,772,336
- Issue date Sep 20, 1988
- Hitachi, Ltd.
- Kunio Enomoto
- C21 - METALLURGY OF IRON
Information Patent Grant
Method of heating piping arrangement and heating coil
- Patent number 4,590,346
- Issue date May 20, 1986
- Hitachi, Ltd.
- Isao Sugihara
- C21 - METALLURGY OF IRON
Information Patent Grant
Heat-treating method of weld portion of piping system and heating c...
- Patent number 4,505,763
- Issue date Mar 19, 1985
- Hitachi, Ltd.
- Isao Sugihara
- C21 - METALLURGY OF IRON