Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4842823 | Austenitic steel having improved high-temperature strength and corrosion resistance | Yoshiatsu Sawaragi, Kunihiko Yoshikawa | 1989-06-27 |
| 4799972 | Process for producing a high strength high-Cr ferritic heat-resistant steel | Fujimitsu Masuyama, Takashi Daikoku, Hisao Haneda, Kunihiko Yoshikawa, Atsuro Iseda | 1989-01-24 |