Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7787341 | Optical disk device and method for determining disk type | Mikio Kakizaki | 2010-08-31 |
| 7715288 | Optical disk apparatus and data read-out control method | — | 2010-05-11 |
| 7502286 | Rotation correcting apparatus and optical disk apparatus | Yasuhiro Hayashi, Kazumi Sugiyama | 2009-03-10 |
| 7295498 | Disk apparatus and method of generating a tracking error signal | Takeshi Nakano | 2007-11-13 |
| 7164630 | Optical disk apparatus | Takeshi Nakano | 2007-01-16 |
| 6111832 | Disk discrimination method and device | Shigeo Tsuchiya, Tatsuro Shimizu | 2000-08-29 |
| 5844395 | Speed detection apparatus, speed control motor, and track jump control circuit | — | 1998-12-01 |
| 5844873 | Disc reading apparatus having a transferable motor unit and motor power disconnection | Noboru Aoyama, Takuro Ono | 1998-12-01 |
| 5789891 | Speed detection apparatus, speed control motor, and track jump control circuit | — | 1998-08-04 |
| 5761163 | Track jump servo apparatus for disc reproducing system | Takayuki Uchida | 1998-06-02 |
| 5712560 | Drive speed detector for a motor that drives a data reproducing device | Satoru Maeda | 1998-01-27 |
| 5572494 | Device for detecting traveling speed of pickup | Taiji Inomata | 1996-11-05 |
| 5528568 | Device for detecting traveling speed of pickup | Taiji Inomata | 1996-06-18 |
| 5521891 | Speed detection apparatus, speed control motor, and track jump control circuit | — | 1996-05-28 |
| 5375110 | Optical data reading apparatus having means for detecting data degradation resulting from dust coverng the optical pick up head | — | 1994-12-20 |
| 5285432 | Track jump control circuit | — | 1994-02-08 |
| 5067128 | Recorded data reading system | — | 1991-11-19 |
| 4955010 | Constant velocity track jump servo system for disc players | Daiki Nabeshima | 1990-09-04 |
| 4937803 | Track acquisition apparatus and method with specified velocity pattern | — | 1990-06-26 |
| 4748607 | Track accessing system using an integrated velocity signal | — | 1988-05-31 |
| 4623994 | Scanning servo system for optical-disc information reproducing apparatus | Daiki Nabeshima | 1986-11-18 |
| 4531099 | Amplifier | — | 1985-07-23 |
| 4520469 | Tracking servo system for optical-disc information reproducing apparatus | Shigeru Todokoro, Satoru Maeda | 1985-05-28 |