Takafumi Yamaji

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Surface-treated steel sheet and method for manufacturing the same
- Patent number 7,842,400
- Issue date Nov 30, 2010
- JFE Steel Corporation
- Takafumi Yamaji
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Surface-treated steel sheet and production method therefor
- Patent number 6,677,053
- Issue date Jan 13, 2004
- NKK Corporation
- Takafumi Yamaji
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Coated steel sheet and method for manufacturing the same
- Patent number 6,610,422
- Issue date Aug 26, 2003
- NKK Corporation
- Toshihiko Ooi
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Coated steel sheet having excellent corrosion resistance and method...
- Patent number 6,562,474
- Issue date May 13, 2003
- NKK Corporation
- Naoto Yoshimi
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Rust-preventive lubricant composition for zinc-plated steel material
- Patent number 5,221,490
- Issue date Jun 22, 1993
- NKK Corporation
- Yasuhisa Tajiri
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...

Patents Applicationslast 30 patents

Information Patent Application
Surface-treated steel sheet and method for producing same
- Publication number 20060182988
- Publication date Aug 17, 2006
- Takafumi Yamaji
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
Surface-treated steel sheet and production method therefor
- Publication number 20020155314
- Publication date Oct 24, 2002
- Takafumi Yamaji
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...