Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5060222 | Method of overwriting information on recording medium | Mitsuru Sawano, Younosuke Takahashi | 1991-10-22 |
| 5006387 | Information recording medium | Toshiyuki Takao | 1991-04-09 |