Issued Patents All Time
Showing 26–50 of 89 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7242653 | Optical disc apparatus capable of detecting recording characteristics based on a predetermined signal prerecorded and reproduced | Toshihiro Ogawa | 2007-07-10 |
| 7212486 | Optical disk device setting a gain of an amplifier so that a peak value and a bottom value of wobble signal components coincide | Keishi Ueno | 2007-05-01 |
| 7209421 | Optical disk apparatus for detecting wobble signal | — | 2007-04-24 |
| 7170837 | Optical disk device having means for generating a tracking offset signal according to laser diode current or temperature | — | 2007-01-30 |
| 7154417 | Optical disk apparatus | — | 2006-12-26 |
| 7151723 | Optical disc device | Norikazu Takasaka | 2006-12-19 |
| 7120110 | Signal processing circuit for noise elimination and demodulator circuit using the same for accurate demodulation | — | 2006-10-10 |
| 7102461 | Surface acoustic wave element, surface acoustic wave device, surface acoustic wave duplexer, and method of manufacturing surface acoustic wave element | Masahiro Nakano, Katsuo Sato | 2006-09-05 |
| 6999388 | Optical disk apparatus | Chisato Takayama, Keishi Ueno | 2006-02-14 |
| 6992962 | Wobble signal detection circuit having a lowpass filter for detecting a wobble signal with reduced sampling noise | Keishi Ueno | 2006-01-31 |
| 6990056 | Optical disk device | — | 2006-01-24 |
| 6987719 | Optical disk device | — | 2006-01-17 |
| 6956805 | Signal processing circuit and method for extracting superimposed signal with accuracy | — | 2005-10-18 |
| 6954709 | Signal processing circuit outputting a signal representing the number of times an input signal rises in a predetermined period as a signal corresponding to a quality of the input signal | — | 2005-10-11 |
| 6904009 | Optical disk apparatus | Toshihiro Ogawa | 2005-06-07 |
| 6876707 | Signal processing circuit and signal processing method | Keishi Ueno | 2005-04-05 |
| 6807135 | Tilt detection system, tilt detection method and tilt adjustment method | Keishi Ueno | 2004-10-19 |
| 6794922 | Signal processing circuit integrating pulse widths of an input pulse signal according to polarities | — | 2004-09-21 |
| 6778478 | Optical disk recording apparatus and method of recording data on optical disk | Naoto Takeda, Kaname Hayasaka | 2004-08-17 |
| 6738325 | Optical disk unit capable of reducing tracking offset | — | 2004-05-18 |
| 6711108 | Optical disc recording apparatus and medium | Yasuhide Ishimori | 2004-03-23 |
| 6680892 | Optical disk device offsetting a wobble signal component superimposed on an RF signal and the wobble signal component added in a threshold value upon making the RF signal binary | — | 2004-01-20 |
| 6670831 | Signal processing circuit and method for measuring pulse width under existence of chattering noise | — | 2003-12-30 |
| 6489861 | Antenna duplexer with divided and grounded transmission line | Kazushige Noguchi, Satoshi Terada, Yoshiaki Fujita, Tomokazu Komazaki | 2002-12-03 |
| 6438077 | Optical disk unit | — | 2002-08-20 |