Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809251 | Prewritten data storage medium and optical scanning device therefor | Daniel Bec, Jean-Louis Gerard | 1989-02-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809251 | Prewritten data storage medium and optical scanning device therefor | Daniel Bec, Jean-Louis Gerard | 1989-02-28 |