Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4532105 | Casting alloy resistant to corrosion and wear at elevated temperatures | Saburo Kunioka, Kiwamu Okuma, Hatsuo Kawaguti | 1985-07-30 |
| 4392878 | Glass fiber forming unit | Kiwamu Okuma, Masao Kizara, Keiji Otaki, Ayahiro Hirai | 1983-07-12 |