Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5590236 | Speed controller or an instrument having a speed controller including detection means for linearly detecting the amount of rotation less than one full rotation of a rotating member | Osamu Sato | 1996-12-31 |
| 5072162 | Speed controller and instrument having the same | Osamu Sato | 1991-12-10 |
| 4825236 | Shutter for camera | Teiji Hashimoto, Fumio Shimada | 1989-04-25 |