Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875112 | Compound pulse dimming circuitry for conditioning readback signals | Martin H. Dost, Constantin Michael Melas, Lionel D. Provazek | 1989-10-17 |
| 4819091 | High speed magnetic disk contact recording system | Blasius Brezoczky | 1989-04-04 |