Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889564 | Magnetic disk cleaning method and apparatus | Yasushi Kikuchi | 1989-12-26 |
| 4801334 | Method of and apparatus for cleaning magnetic recording disk cartridge | Toshihiko Wada | 1989-01-31 |