Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826543 | Process for producing high toughness, high strength steel having excellent resistance to stress corrosion cracking | Yoshihiro Okamura, Katsuo Kaku, Junichi Kobayashi | 1989-05-02 |
| 4814141 | High toughness, ultra-high strength steel having an excellent stress corrosion cracking resistance with a yield stress of not less than 110 kgf/mm.sup.2 | Yasuho Imai, Yoichiro Tobe, Ko Moriyama, Syuzo Ueda, Seimei Karino | 1989-03-21 |