Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882940 | Power transmission mechanism for tractor | Kojiro Yamaoka, Toshiro Azuma, Koichiro Fujisaki | 1989-11-28 |
| 4827783 | Key-shift transmission | Kojiro Yamaoka | 1989-05-09 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882940 | Power transmission mechanism for tractor | Kojiro Yamaoka, Toshiro Azuma, Koichiro Fujisaki | 1989-11-28 |
| 4827783 | Key-shift transmission | Kojiro Yamaoka | 1989-05-09 |