Issued Patents 1989
Showing 1–1 of 1 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, Takashi Tomie | 1989-09-12 |