Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7489607 | Method of inspecting a phase-change type optical recording medium | — | 2009-02-10 |
| 6038098 | Rotary head apparatus with magnetic heads having respective gaps at azimuth angles which are not substantially equal to each other | — | 2000-03-14 |
| 4622614 | Magnetic erasing head | Keitaro Yamashita | 1986-11-11 |