Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8280023 | Communication conference system, voice changing device, and signal converting adaptor | Toshiaki Ishibashi | 2012-10-02 |
| 8243950 | Teleconferencing apparatus with virtual point source production | Ryo Tanaka, Takuya Tamaru | 2012-08-14 |
| 8238584 | Voice signal transmitting/receiving apparatus | Kosuke Saito, Shinji Aoshima, Toshiaki Ishibashi, Yuichiro Suenaga, Chikara Kobayashi | 2012-08-07 |
| 8130968 | Light-emission responder | Takuya Tamaru | 2012-03-06 |
| 7539088 | Optical disc recording and reproducing method adaptive to wobble pregroove | — | 2009-05-26 |
| 7492682 | Optical disk recording apparatus controllable by table of multi-pulse patterns | — | 2009-02-17 |
| 7414935 | Method of overwriting optical disk with adapting initial writing conditions | — | 2008-08-19 |
| 7248554 | Laser driving apparatus | Takashi Nagano, Koji Suzuki | 2007-07-24 |
| 7075869 | Method and apparatus for determining applicable recording speed of a recordable optical disk | — | 2006-07-11 |
| 7038997 | Optical disk with prerecorded control information | — | 2006-05-02 |
| 7012864 | Optical disk recorder for writing data with variable density | Takuya Tamaru, Tatsuo Fushiki, Yusuke Konagai, Akira Usui, Kentaro Nomoto +2 more | 2006-03-14 |
| 6980495 | Optical recording apparatus with interleaving blank rounds into spiral track | Akira Usui, Shinji Aoshima, Hiromitsu Shibata, Masaki Dojun | 2005-12-27 |
| 6894961 | Recordable optical disk and optical disk recording device utilizing pre-recorded recording speed information | — | 2005-05-17 |
| 6894967 | Optical disk recorder for writing data with variable density | Takuya Tamaru, Tatsuo Fushiki | 2005-05-17 |
| 6541186 | Method of manufacturing an optical disk having areas of different recording densities or functions | Nobuyuki Sato | 2003-04-01 |
| 6310854 | Optical disk having areas of different recording densities or functions | Nobuyuki Sato | 2001-10-30 |
| 5872763 | Method and device for recording on optical disc | — | 1999-02-16 |
| 5559785 | Optimum recording laser power control by testing an EFT signal's asymmetry with a frame synchronization circuit | Kazuhiko Honda, Kazunobu Fujiwara | 1996-09-24 |
| 5526333 | Optical disk recording device | Akira Usui, Yukihisa Nakajo, Yoshihiko Shiozaki | 1996-06-11 |
| 5003527 | System for recording optical discs for use with optical disc playback only devices | Seiji Matsumoto | 1991-03-26 |
| 4998237 | Optical disc recording device having improved accuracy of pit formation | Yoshiaki Suzuki | 1991-03-05 |