Yutaka Nagahama

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Laser-welded steel pipe and method therefor
- Patent number 6,140,601
- Issue date Oct 31, 2000
- NKK Corporation
- Moriaki Ono
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Laser-welded steel pipe
- Patent number 5,961,748
- Issue date Oct 5, 1999
- NKK Corporation
- Moriaki Ono
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method of making a steel pipe by electric resistance heating of opp...
- Patent number 5,653,899
- Issue date Aug 5, 1997
- NKK Corporation
- Takayuki Odake
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR