Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8908176 | Apparatus and method for obtaining spectral characteristics | Yoichi Kubota, Naohiro Kamijo, Kohei Shimbo, Manabu Seo | 2014-12-09 |
| 7652540 | Fine clock resolution digital phase locked loop apparatus | — | 2010-01-26 |
| 7630286 | Digital PLL circuit and optical disk apparatus having digital PLL circuit | Isamu Moriwaki | 2009-12-08 |
| 7298216 | Fine clock resolution digital phase locked loop apparatus | — | 2007-11-20 |
| RE39513 | Demodulation circuit for demodulating wobbling signal | Hiroshi Maegawa | 2007-03-13 |
| 7075868 | Recording clock generating apparatus for a data recording system | — | 2006-07-11 |
| 6980499 | Data recording clock signal generator for generating a recording clock signal for recording data on a recordable medium | — | 2005-12-27 |
| 6859425 | Wobble signal detection circuit and optical disk device | Hiroshi Maegawa | 2005-02-22 |
| 6693862 | Recording clock generating apparatus for a data recording system | — | 2004-02-17 |
| 6400673 | Optical disk drive | — | 2002-06-04 |
| 6345018 | Demodulation circuit for demodulating wobbling signal | Hiroshi Maegawa | 2002-02-05 |
| 6125089 | Recording timing control circuit for optical disk driving device | — | 2000-09-26 |
| 6061313 | Optical disk drive having a time code detection device for reliably detecting a time code of a recordable optical disk | — | 2000-05-09 |
| 5438601 | Reference clock frequency divider | Hiroshi Maegawa, Yuichi Kadokawa | 1995-08-01 |
| 5272686 | Servo signal generator for optical disk driving apparatus | — | 1993-12-21 |
| 5241521 | Optical disk driving apparatus | — | 1993-08-31 |
| 5235576 | Optical disc apparatus | — | 1993-08-10 |
| 5222057 | Tracking servo method used in an optical disk drive unit | Haruyuki Suzuki | 1993-06-22 |
| 5073776 | Data modulating system | — | 1991-12-17 |
| 5063552 | Optical disk apparatus with data transfer rate and rotational speed variable by annular zones | — | 1991-11-05 |
| 5060214 | Optical pickup device keeping coincident the optical axes of the objective lens and of the recording/reproducing beam | Masahiko Nakayama, Haruhiko Kono, Kiyoshi Yokomori | 1991-10-22 |
| 4942370 | PLL circuit with band width varying in accordance with the frequency of an input signal | — | 1990-07-17 |
| 4835754 | Tracking control device of an optical pick-up | Kazutaka Yamamoto | 1989-05-30 |
| 4816722 | Digital phase-locked loop filter | — | 1989-03-28 |
| 4817069 | Tracking control system of an optical pick-up | — | 1989-03-28 |