Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5827379 | Process for producing extra high tensile steel having excellent stress corrosion cracking resistance | Yoshihiro Okamura, Tomoya Koseki, Ichiro Nakagawa | 1998-10-27 |
| 5447581 | Process for producing extra high tensile steel in 1080 MPa yield strength class having excellent stress corrosion cracking resistance | Yoshihiro Okamura | 1995-09-05 |
| 5062905 | Method of producing non-oriented magnetic steel plate having high magnetic flux density | Yukio Tomita, Tatsuya Kumagai | 1991-11-05 |
| 5061325 | Method of producing high tension steel superior in weldability and low-temperature toughness | Yoshihiro Okamura, Seinosuke Yano, Hidetaka Chiba | 1991-10-29 |
| 5037493 | Method of producing non-oriented magnetic steel plate having high magnetic flux density and uniform magnetic properties through the thickness direction | Yukio Tomita | 1991-08-06 |
| 4988393 | Method for producing high-strength steel having improved weldability | Yukio Tsuda, Atsuo Tanaka, Keiichi Hattori | 1991-01-29 |
| 4950336 | Method of producing non-oriented magnetic steel heavy plate having high magnetic flux density | Yukio Tomita, Yukio Tsuda, Katsuyoshi Yamanaka, Tatsuya Kumagai | 1990-08-21 |