Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5002289 | Bi-directional oil seal with leakage recovering rib formations | Hiroyoshi Yasui, Michitoshi Mitsumaru | 1991-03-26 |
| 4824324 | Water pump | Michitoshi Mitsumaru, Keiichi Furukawa, Shiro Sawa | 1989-04-25 |