Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4195720 | Counter shaft automatic power transmission | Keizaburo Usui | 1980-04-01 |
| 4194608 | Controls for clutch, motor and transmission | Keizaburo Usui, Hideo Hamada, Sigeaki Yamamuro | 1980-03-25 |