Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9903023 | Hot rolled steel sheet and method for manufacturing the same | Naoki Maruyama, Tatsuo Yokoi, Hiroyuki Tanahashi, Atsushi Seto | 2018-02-27 |
| 8747577 | High yield ratio and high-strength thin steel sheet superior in weldability and ductility, high-yield ratio high-strength hot-dip galvanized thin steel sheet, high-yield ratio high-strength hot-dip galvannealed thin steel sheet, and methods of production of same | Naoki Yoshinaga, Shunji Hiwatashi, Yasuharu Sakuma | 2014-06-10 |
| 8084143 | High-yield-ratio and high-strength thin steel sheet superior in weldability and ductility, high-yield-ratio high-strength hot-dip galvanized thin steel sheet, high-yield ratio high-strength hot-dip galvannealed thin steel sheet, and methods of production of same | Naoki Yoshinaga, Shunji Hiwatashi, Yasuharu Sakuma | 2011-12-27 |
| 7413780 | High strength galvannealed steel sheet excellent in workability and a method of production of the same | Kazuhiko Honda, Masaharu Kameda, Yasuharu Sakuma, Akio Saito, Tetsuo Nishiyama | 2008-08-19 |
| 6129992 | High-strength cold rolled steel sheet and high-strength plated steel sheet possessing improved geomagnetic shielding properties and process for producing the same | Yasuharu Sakuma, Satoru Tanaka, Kazuo Koyama, Yujiro Miyauchi, Takeshi Kubota +3 more | 2000-10-10 |
| 5855696 | Ultra low carbon, cold rolled steel sheet and galvanized steel sheet having improved fatigue properties and processes for producing the same | Makoto Tezuka, Kohsaku Ushioda, Shiro Fujii, Yasuharu Sakuma, Tatsuo Yokoi | 1999-01-05 |
| 4956025 | Process for producing cold-rolled high strength steel sheet having excellent formability and conversion-treatability | Kazuo Koyama, Taketoshi Taira, Kaoru Kawasaki, Nobuhiko Matsuzu | 1990-09-11 |
| 4801341 | One-sided enamelable hot-rolled steel sheet and process for producing the same | Kazuo Koyama, Nobuhiko Matsuzu, Takahito Watanabe | 1989-01-31 |
| 4769088 | Process for producing hot-rolled steel sheet having high r value | Kazuo Koyama, Hiroshi Katoh, Nobuhiko Matsuzu | 1988-09-06 |