Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6678224 | Tracking error balance adjustment circuit and a current control circuit used for an optical disk playback apparatus, and an optical disk playback apparatus including the same | Ryuichi Yamashita, Hiroyuki Haga | 2004-01-13 |
| 6504799 | Tracking error balance adjustment circuit and a current control circuit used for an optical disk playback apparatus, and an optical disk playback apparatus including the same | Ryuichi Yamashita, Hiroyuki Haga | 2003-01-07 |