Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9181609 | Welded steel pipe for linepipe having high compressive strength and excellent sour gas resistance and manufacturing method thereof | Nobuyuki Ishikawa, Akihiko Tanizawa, Hitoshi Sueyoshi, Masayuki Horie, Yasumitsu Kiyoto | 2015-11-10 |
| 8926766 | Low yield ratio, high strength and high uniform elongation steel plate and method for manufacturing the same | Junji Shimamura, Nobuyuki Ishikawa | 2015-01-06 |
| 8801874 | Steel plate and steel pipe for line pipes | Nobuyuki Ishikawa, Makoto Suzuki, Tomohiro Matsushima, Akiyoshi Tsuji, Shinichi Kakihara +1 more | 2014-08-12 |
| 8778096 | Low yield ratio, high strength and high toughness steel plate and method for manufacturing the same | Junji Shimamura, Nobuyuki Ishikawa | 2014-07-15 |
| 8765269 | High strength steel pipe for low-temperature usage having excellent buckling resistance and toughness of welded heat affected zone and method for producing the same | Junji Shimamura, Nobuyuki Ishikawa, Mitsuhiro Okatsu | 2014-07-01 |
| 8404178 | High-strength pearlitic steel rail having excellent delayed fracture properties | Minoru Honjo, Tatsumi Kimura, Shinichi Suzuki | 2013-03-26 |
| 8361382 | High-strength pearlitic steel rail having excellent delayed fracture properties | Minoru Honjo, Tatsumi Kimura, Shinichi Suzuki | 2013-01-29 |
| 8357252 | High tensile strength steel having favorable delayed fracture resistance and method for manufacturing the same | Akihide Nagao, Kenji Oi, Kenji Hayashi | 2013-01-22 |
| 7955445 | Internal high hardness type pearlitic rail with excellent wear resistance and rolling contact fatigue resistance and method for producing same | Minoru Honjo, Tatsumi Kimura, Shinichi Suzuki, Kimihiro Nishimura, Shinji Mitao | 2011-06-07 |
| 5403410 | Abrasion-resistant steel | Yasunobu Kunisada, Tetsuya Sanpei, Kazunori Yako, Kenji Hirabe | 1995-04-04 |
| 5393358 | Method for producing abrasion-resistant steel having excellent surface property | Tetsuya Sanpei, Kazunori Yako, Kenji Hirabe, Yasunobu Kunisada | 1995-02-28 |
| 5284529 | Abrasion-resistant steel | Yasunobu Kunisada, Tetsuya Sanpei, Kazunori Yako, Kenji Hirabe | 1994-02-08 |
| 5236521 | Abrasion resistant steel | Tetsuya Sanpei, Kazunori Yako, Kenji Hirabe, Yasunobu Kunisada | 1993-08-17 |