Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8270274 | Optical disk inspection device and inspection method | — | 2012-09-18 |
| 8018798 | Demodulation circuit and optical disk drive | — | 2011-09-13 |
| 7983132 | Optical disk apparatus | — | 2011-07-19 |
| 7957239 | Optical disk drive for adjusting power of a recording laser | — | 2011-06-07 |
| 7764580 | Demodulator | — | 2010-07-27 |
| 7697405 | Inspection apparatus for optical disk having phase modulated wobble tracks and optical disk apparatus for driving the optical disk | Akira Mashimo | 2010-04-13 |
| 7541955 | A/D conversion circuit and optical disk drive | — | 2009-06-02 |
| 7436746 | Tilt detection system, tilt detection method and tilt adjustment method | Akira Mashimo | 2008-10-14 |
| 7298680 | Optical disc apparatus | Kiyoshi Shidara | 2007-11-20 |
| 7212486 | Optical disk device setting a gain of an amplifier so that a peak value and a bottom value of wobble signal components coincide | Akira Mashimo | 2007-05-01 |
| 7054246 | Optical disk device adapted for reliably detecting pre-pit information formed on an optical disk | — | 2006-05-30 |
| 6999388 | Optical disk apparatus | Akira Mashimo, Chisato Takayama | 2006-02-14 |
| 6992962 | Wobble signal detection circuit having a lowpass filter for detecting a wobble signal with reduced sampling noise | Akira Mashimo | 2006-01-31 |
| 6876707 | Signal processing circuit and signal processing method | Akira Mashimo | 2005-04-05 |
| 6807135 | Tilt detection system, tilt detection method and tilt adjustment method | Akira Mashimo | 2004-10-19 |
| 6031796 | Optical disk apparatus | Misao Fukuda, Takayuki Masuda, Akira Mashimo | 2000-02-29 |
| 5914927 | Optical disk apparatus | Misao Fukuda, Hiroyuki Hishiyama, Akira Mashimo | 1999-06-22 |
| 5305157 | Read circuit providing two different reference levels for reading the servo sectors and data sectors of a rotating data storage disk | Sumio Wada | 1994-04-19 |