Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8391113 | Optical disc for tuple-speed recording and optical disc device for tuple-speed recording | Morio Nakatani, Masato Fuma, Kazuo Watabe, Yutaka Kashihara, Akihito Ogawa +2 more | 2013-03-05 |
| 7643394 | Optical disk, optical disk recording method, and optical disk recording apparatus | Yutaka Kashihara, Hideki Takahashi, Akihito Ogawa, Yutaka Yamanaka, Shigeru Shimonou +3 more | 2010-01-05 |
| 7551533 | Optical disk, optical disk drive and method of playing back an optical disk | Yutaka Kashihara, Atsushi Ishihara, Yuji Nagai, Taku Kato, Yutaka Yamanaka | 2009-06-23 |
| 7492697 | Optical disc recording method and apparatus | Tsuyoshi Yamamoto, Katsuki Hattori, Masato Fuma, Yutaka Yamanaka, Shigeru Shimonou +3 more | 2009-02-17 |
| 7471602 | Recording/reproducing method and recording/reproducing apparatus and optical disk | Akihito Ogawa, Yutaka Kashihara, Hideki Takahashi, Yutaka Yamanaka, Shigeru Shimonou | 2008-12-30 |
| 7471617 | Optical disc medium having extended record control data areas, optical disc apparatus using the same, and data recording method on the same | Yutaka Yamanaka, Shigeru Shimonou, Hideki Takahashi, Akihito Ogawa, Yutaka Kashihara | 2008-12-30 |
| 7355957 | Optical disc medium having a system information recording area of low recording density | Yutaka Yamanaka, Toshiaki Iwanaga, Chosaku Noda, Yutaka Kashihara, Akihito Ogawa +1 more | 2008-04-08 |
| 6875488 | Optical information recording medium | Eiji Kariyada, Shuichi Ohkubo | 2005-04-05 |
| 6646978 | Optical storage medium with improved substrate structure to provide uniform signal quality | Shuichi Okubo | 2003-11-11 |
| 5982739 | Optical data recording apparatus producing a laser beam having a diameter larger than optical media groove width | — | 1999-11-09 |
| 5631895 | Optical information recording medium | Mitsuya Okada, Shuichi Ohkubo | 1997-05-20 |
| 5521901 | Re-writable phase change type optical disk with suppressed recording mark distortion | Mitsuya Okada, Shuichi Ohkubo | 1996-05-28 |
| 5506022 | Optical information-recording medium | — | 1996-04-09 |
| 5492794 | Information recording medium | Yoshitaka Kawanishi | 1996-02-20 |
| 5342714 | Method for recording, erasing and reproducing data on an optical data recording medium | — | 1994-08-30 |