Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882479 | Optical rotary encoder using dual frequency beat difference | Yoshinori Bessho | 1989-11-21 |
| 4852106 | Optical system for producing controlled beat frequency | Yoshinori Bessho | 1989-07-25 |