Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879709 | Dye-polymer optical data storage media with improved recording sensitivity | — | 1989-11-07 |
| 4852077 | Optical data storage media with spatially variable energy absorptivity | Robert Guerra | 1989-07-25 |