Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6740991 | Current noise insulated spindle motor | Keiichi Takagi, Seiichi Yamazaki, Toshiyuki Kaneko | 2004-05-25 |
| 6226245 | Control system for controlling the rotational speed of a disc to a maximum speed without causing excessive vibration | — | 2001-05-01 |
| 5777963 | Device for opening and closing a tracking servo loop of an optical disc reproduction device in accordance with the value of an on-track signal | Wataru Hasegawa | 1998-07-07 |