Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5636191 | Positioning control system utilizing optical beam having servo-error signal generating circuit | Akira Minami, Shigeyoshi Tanaka, Michio Matsuura, Hiromichi Kuwano | 1997-06-03 |