Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846904 | Martensitic stainless steel having excellent hardness by subzero treatment | Hiroshi Arai, Kazuo Mashimo, Jyou Tanioka | 1989-07-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846904 | Martensitic stainless steel having excellent hardness by subzero treatment | Hiroshi Arai, Kazuo Mashimo, Jyou Tanioka | 1989-07-11 |