Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875114 | System for detecting a reference track on a disk surface in a disc storage unit | — | 1989-10-17 |
| 4862051 | Stepping motor's negative-phase braking control device | — | 1989-08-29 |
| 4807063 | Head position control system with multiple servo areas staggered on various disks | — | 1989-02-21 |