Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808900 | Bi-directional difference counter | Wilhelm Ohlinger | 1989-02-28 |
| 4797756 | "Method for positioning head in disk drive deriving ""position"" offset from ""quadrature"" signals" | Hideki Yoshihara | 1989-01-10 |