Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6744705 | Optical disc recording and reproducing apparatus | Katsutoshi Sumida, Masanobu Shimizu | 2004-06-01 |
| 6700841 | Optical-disc recording and reproducing apparatus | Masanobu Shimizu, Katsutoshi Sumida | 2004-03-02 |
| 6212143 | Spindle motor control system for a disk player | Katsutoshi Sumida, Masanobu Shimizu | 2001-04-03 |
| 5835463 | Spindle motor control system for use in an optical disk player | Masanobu Shimizu, Katsutoshi Sumida | 1998-11-10 |