Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868591 | Photodetector element for optical rangefinders | — | 1989-09-19 |
| 4839685 | Light receiving element for a rangefinder | Minoru Takahashi | 1989-06-13 |
| 4814810 | Active-type auto-focusing mechanism | — | 1989-03-21 |