Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7191458 | Turntable and optical disk using the turntable | — | 2007-03-13 |
| 6829777 | Turn table and optical disk using the turn table | — | 2004-12-07 |
| 4412321 | Record changer | Hiroyuki Urushibata, Masao Goto | 1983-10-25 |