Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865916 | Magnetic recording medium method for producing the same, and method for recording and reproduction using the same and magnetic head | Michio Yamaura, Toshiaki Yatabe, Hiroshi Matsuzawa | 1989-09-12 |
| 4842708 | Perpendicular magnetic recording medium, method for producing the same, and sputtering device | Sadao Kadokura, Kazuhiko Honjo, Masahiko Naoe | 1989-06-27 |