Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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, Ko Moriyama, Seinosuke Yano, Syuzo Ueda, Seimei Karino | 1989-03-21 |