Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4508522 | Double cardan universal joint | Akio Numazawa, Tadanobu Kumagai, Seiichi Nishikawa | 1985-04-02 |
| 4382497 | Device for cooling a frictional clutch for an automobile | Hisao Otani | 1983-05-10 |