Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4992893 | Alignment disk for magnetic disk driving apparatus and method and apparatus for verifying tracking error of the magnetic disk driving apparatus | Hiroshi Kanai, Takeo Sonobe, Seiichi Hayashi, Masayoshi Sunada, Kazuo Kikuchi +7 more | 1991-02-12 |