Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834813 | Wear-resistant alloy of high permeability and methods of producing the same | Hakaru Masumoto | 1989-05-30 |
| 4830685 | Wear-resistant alloy of high permeability and method of producing the same | Hakaru Masumoto | 1989-05-16 |