Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8157930 | Martensitic stainless steel | Hisashi Amaya, Kunio Kondo, Masakatsu Ueda, Keiichi Nakamura | 2012-04-17 |
| 7648587 | Steel product for use as line pipe having high HIC resistance and line pipe produced using such steel product | Tomohiko Omura, Mitsuhiro Numata | 2010-01-19 |
| 7361236 | Martensitic stainless steel | Kunio Kondo, Yuichi Komizo, Masaaki Igarashi | 2008-04-22 |
| 6517643 | Steel having excellent outer surface SCC resistance for pipeline | Hitoshi Asahi, Shigeo Okano, Yasuyoshi Yamane, Hideaki Fukai | 2003-02-11 |
| 6379821 | Martensitic stainless steel welded pipe | Tomohiko Omura, Kunio Kondo, Kazuhiro Ogawa, Masahiko Hamada | 2002-04-30 |
| 6267828 | Low alloy steel for oil country tubular goods and method of making | Kaori Miyata, Kunio Kondo, Tomohiko Omura | 2001-07-31 |
| 6220306 | Low carbon martensite stainless steel plate | Tomohiko Omura | 2001-04-24 |
| 5938865 | Process for producing high-strength seamless steel pipe having excellent sulfide stress cracking resistance | Kunio Kondo, Hajime Osako, Hideki Takabe | 1999-08-17 |
| 5555916 | Steel product excellent in sulfide cracking resistance | — | 1996-09-17 |
| 5383983 | Martensitic stainless steel suitable for use in oil wells | Kunio Kondo, Masakatsu Ueda | 1995-01-24 |