Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE33006 | Feed-water heater comprising low C-Cr-Mo steel components used under wet steam | Fumio Hataya, Masakiyo Izumiya, Yoshikuni Ohshima, Koichi Akutsu, Masaaki Ishikawa +2 more | 1989-08-01 |
| 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, Seinosuke Yano, Seimei Karino | 1989-03-21 |