Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888490 | Optical proximity apparatus and method using light sources being modulated at different frequencies | Stephen M. Copley | 1989-12-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888490 | Optical proximity apparatus and method using light sources being modulated at different frequencies | Stephen M. Copley | 1989-12-19 |