Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872373 | Differential control device | Koichi Aono | 1989-10-10 |
| 4841808 | Differential control device | Kouichi Aono | 1989-06-27 |
| 4821601 | Differential controlling device for differential gear | — | 1989-04-18 |