Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7151568 | Displacement sensor | Masahiro Kawachi, Koji Shimada, Hitoshi Oba, Satoshi Yoneda | 2006-12-19 |
| 6839144 | Optical displacement sensor | Tatsuya Matsunaga, Masahiro Kawachi, Mitsuharu Mano | 2005-01-04 |