Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882639 | Changeover writing circuit for magnetic disk apparatus operable at plural densities | Kiyoto Abe | 1989-11-21 |
| 4805047 | Read/write magnetic disk apparatus operable in plural density modes | Kiyoto Abe | 1989-02-14 |