Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865438 | Spectacles provided with a magnifier having an automatic focusing function | — | 1989-09-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865438 | Spectacles provided with a magnifier having an automatic focusing function | — | 1989-09-12 |