Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8124247 | High-strength welded steel pipe including weld metal having high cold-cracking resistance and method for manufacturing the same | Naoya Hayakawa, Shuichi Sakaguchi, Mitsuhiro Okatsu, Makoto Ota, Shigeki Nishiyama +2 more | 2012-02-28 |
| 6706125 | Linear shape steel excellent in joint fatigue characteristics and production method therefor | Tatsumi Kimura, Yasushi Morikage, Keniti Amano, Takanori Okui, Keizou Taoka +2 more | 2004-03-16 |
| 6699338 | Method of manufacturing corrosion resistant steel materials | Tatsumi Kimura, Kazuhiko Shiotani, Keniti Amano | 2004-03-02 |
| 6537391 | Steel with improved impact penetration resistance and method for producing the same | Kengo Ishige, Tadashi Shibue, Tsutomu Kakinouchi, Osamu Tanigawa, Kiyoshi Uchida +1 more | 2003-03-25 |
| 6521057 | High-strength high-toughness steel products | Noritsugu Itakura, Mitsuhiro Okatsu, Keniti Amano | 2003-02-18 |
| 6451134 | 590MPa class heavy gauge H-shaped steel having excellent toughness and method of producing the same | Tatsumi Kimura, Keniti Amano | 2002-09-17 |
| 6440235 | Method of manufacturing high productive and high strength rolled H-shaped | Tatsumi Kimura, Keniti Amano | 2002-08-27 |
| 6436340 | Weatherable steel material | Kazuhiko Shiotani, Akio Ohmori, Kimihiro Nishimura, Yasuyoshi Yamane, Keniti Amano | 2002-08-20 |
| 6358335 | Continuous casting slab suitable for the production of non-tempered high tensile steel material | Akio Ohmori, Keniti Amano | 2002-03-19 |
| 6344093 | High tensile strength steel product for high heat input welding, having excellent toughness in heat-affected zone | Akio Ohmori, Keniti Amano | 2002-02-05 |
| 6299710 | Method of producing a bainite steel product | Noritsugu Itakura, Mitsuhiro Okatsu, Keniti Amano | 2001-10-09 |
| 6068712 | Steel products having superior weathering, method of producing the steel products, and method of forming weathering protective rust on steel product surfaces | Yasuyashi Yamane, Kazuhiko Shiotani, Toshiyuki Hoshino, Keniti Amano, Kimihiro Nishimura | 2000-05-30 |
| 6007644 | Heavy-wall H-shaped steel having high toughness and yield strength and process for making steel | Akio Ohmori, Tatsumi Kimura, Keniti Amano | 1999-12-28 |
| 5989366 | Method of manufacturing thick steel product of high strength and high toughness having excellent weldability and minimal variation of structure and physical properties | Tohru Hayashi, Mitsuhiro Okatsu, Keniti Amano | 1999-11-23 |
| 5948183 | Hot-rolled steel sheet and method for forming hot-rolled steel sheet having low yield ratio, high strength and excellent toughness | Susumu Okada, Masahiko Morita | 1999-09-07 |
| 5900076 | Bainitic steel materials having a less scattering of properties and method of producing the same | Tohru Hayashi, Keniti Amano, Mitsuhiro Okatsu, Kenji Oi, Tomoya Koseki +2 more | 1999-05-04 |
| 5882447 | Heavy-wall structural steel and method | Tatsumi Kimura, Kiyoshi Uchida, Keniti Amano, Takanori Okui | 1999-03-16 |
| 5766381 | Method of producing bainitic steel materials having a less scattering of properties | Tohru Hayashi, Keniti Amano, Mitsuhiro Okatsu, Kenji Oi, Tomoya Koseki +2 more | 1998-06-16 |
| 5743972 | Heavy-wall structural steel and method | Tatsumi Kimura, Kiyoshi Uchida, Keniti Amano, Takanori Okui | 1998-04-28 |
| 4527033 | Steel pipe welding method | Junya Matsuyama, Akio Kamada, Tatsufumi Uegaki, Shigeru Miyake | 1985-07-02 |
| 4442340 | Four-electrode submerged arc welding process | Atsushi Shiga, Tadamasa Yamaguchi | 1984-04-10 |