Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849305 | Magnetic recording medium | — | 1989-07-18 |
| 4820051 | Apparatus for determining microhardness | Yoshihiro Motomura | 1989-04-11 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849305 | Magnetic recording medium | — | 1989-07-18 |
| 4820051 | Apparatus for determining microhardness | Yoshihiro Motomura | 1989-04-11 |