Naoki Doi

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Thick welded steel pipe excellent in low temperature toughness, man...
- Patent number 8,871,039
- Issue date Oct 28, 2014
- Nippon Steel & Sumitomo Metal Corporation
- Yasuhiro Shinohara
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
THICK WELDED STEEL PIPE EXCELLENT IN LOW TEMPERATURE TOUGHNESS, MAN...
- Publication number 20130037162
- Publication date Feb 14, 2013
- Yasuhiro Shinohara
- C21 - METALLURGY OF IRON
Information Patent Application
Steel pipe for high strength line pipe superior in strain aging res...
- Publication number 20090092514
- Publication date Apr 9, 2009
- Hitoshi Asahi
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR