Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5285343 | Magnetic disk with surface protective layer having convex portions and magnetic disk apparatus including such a magnetic disk | Hideaki Tanaka, Shoichi Sawahata, Maki Kondo, Masaki Ohura, Norikazu Tsumita +6 more | 1994-02-08 |