Issued Patents All Time
Showing 26–44 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7280455 | Optical information recording condition adjustment method, recording/reproducing method and apparatus | — | 2007-10-09 |
| 7280462 | Method and apparatus for recording/reproducing optical information | — | 2007-10-09 |
| 7184381 | Optical disk, optical disk recording/reproduction apparatus, and optical disk signal quality evaluation method | Hiromi Honma, Masatsugu Ogawa, Masaki Nakano, Toshiaki Iwanaga, Yutaka Kashihara +1 more | 2007-02-27 |
| 7151642 | Information playback method and apparatus | Masatsugu Ogawa | 2006-12-19 |
| 6875488 | Optical information recording medium | Tatsunori Ide, Eiji Kariyada | 2005-04-05 |
| 6649241 | Phase-change optical disk | — | 2003-11-18 |
| 6606293 | Optical information recording medium and methods for recording, reading, and erasing information thereupon | Mitsuya Okada, Masaki Itoh | 2003-08-12 |
| 6140011 | Optical information recording medium | — | 2000-10-31 |
| 5946280 | Method for verifying accuracy of data written on a phase transition optical disk during the writing operation | — | 1999-08-31 |
| 5906908 | System and method for simultaneously verifying optical data writing and optical data writing medium for use therein | Mitsuya Okada, Masaki Itou | 1999-05-25 |
| 5900347 | Optical information recording medium | — | 1999-05-04 |
| 5862122 | Phase change optical disk and a method for recording and playbacking optical information on or from an optical disk | Mitsuya Okada | 1999-01-19 |
| 5798993 | System and method for simultaneously verifying optical data writing and optical data writing medium for use therein | Mitsuya Okada, Masaki Itou | 1998-08-25 |
| 5719006 | Optical information recording medium | — | 1998-02-17 |
| 5717673 | Method and apparatus for verifying accuracy of data written on a phase transition optical disk during the writing operation | — | 1998-02-10 |
| 5650992 | Phase change optical disc | — | 1997-07-22 |
| 5631895 | Optical information recording medium | Mitsuya Okada, Tatsunori Ide | 1997-05-20 |
| 5557599 | Method for initializing a phase-change type of optical disk utilizing either absorption rates or mark lengths | — | 1996-09-17 |
| 5521901 | Re-writable phase change type optical disk with suppressed recording mark distortion | Mitsuya Okada, Tatsunori Ide | 1996-05-28 |