Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889979 | Method for extending life of optically recorded information | Jerome Drexler | 1989-12-26 |
| 4884260 | Data recording system for optical memory tape | Jerome Drexler | 1989-11-28 |
| 4863819 | Read-only optical data card | Jerome Drexler | 1989-09-05 |
| 4837134 | Optical memory card with versatile storage medium | Jerome Drexler | 1989-06-06 |