Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881076 | Encoding for pit-per-transition optical data recording | Jonathan Ashley, Paul H. Siegel | 1989-11-14 |
| 4823330 | Focus servo loop off-set compensation | Nelson K. Arter, Mark L. Rhoades | 1989-04-18 |