Katsuyuki Imai

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Butt welded tubular structure of austenite stainless steel
- Patent number 4,348,041
- Issue date Sep 7, 1982
- Hitachi, Ltd.
- Katsuyuki Imai
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method of making a structure immune against stress corrosion cracking
- Patent number 4,234,119
- Issue date Nov 18, 1980
- Hitachi, Ltd.
- Isao Masaoka
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method of cooling weld in steel piping and apparatus therefor
- Patent number 4,223,197
- Issue date Sep 16, 1980
- Hitachi, Ltd.
- Katsuyuki Imai
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method for welding of austenitic stainless steel piping
- Patent number 4,218,604
- Issue date Aug 19, 1980
- Hitachi, Ltd.
- Isao Masaoka
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR