Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888512 | Surface multipolar rare earth-iron-boron rotor magnet and method of making | — | 1989-12-19 |
| 4820592 | Permanent oxide magnet and method of coating same | Masayoshi MINEGISHI, Nobuyuki Yamada, Kohji Kobayashi | 1989-04-11 |