Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7648587 | Steel product for use as line pipe having high HIC resistance and line pipe produced using such steel product | Takahiro Kushida, Mitsuhiro Numata | 2010-01-19 |
| 7635406 | Method for manufacturing a low alloy steel excellent in corrosion resistance | Mitsuhiro Numata, Yoshihiko Higuchi | 2009-12-22 |
| 7531129 | Stainless steel for high-pressure hydrogen gas | Masaaki Igarashi, Hiroyuki Semba, Mitsuo Miyahara, Kazuhiro Ogawa | 2009-05-12 |
| 7396421 | Duplex stainless steel and manufacturing method thereof | Satoshi Matsumoto | 2008-07-08 |
| 7393597 | Welded joint made of an austenitic steel | Kazuhiko Ogawa, Masaaki Igarashi, Hiroyuki Semba, Mitsuo Miyahara | 2008-07-01 |
| 7264684 | Steel for steel pipes | Mitsuhiro Numata, Yoshihiko Higuchi | 2007-09-04 |
| 7074283 | Low alloy steel | — | 2006-07-11 |
| 6958099 | High toughness steel material and method of producing steel pipes using same | Shigeru Nakamura, Kaori Kawano, Toshiharu Abe | 2005-10-25 |
| 6379821 | Martensitic stainless steel welded pipe | Takahiro Kushida, Kunio Kondo, Kazuhiro Ogawa, Masahiko Hamada | 2002-04-30 |
| 6267828 | Low alloy steel for oil country tubular goods and method of making | Takahiro Kushida, Kaori Miyata, Kunio Kondo | 2001-07-31 |
| 6220306 | Low carbon martensite stainless steel plate | Takahiro Kushida | 2001-04-24 |