Issued Patents All Time
Showing 26–50 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE39860 | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses | Yasuhiro Gotoh | 2007-09-25 |
| RE39447 | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses | Yasuhiro Gotoh | 2006-12-26 |
| 7142496 | Optical information recording method, device, and recording medium with plural recording layers | Kenichi Nishiuchi | 2006-11-28 |
| 7116623 | Optical information recording method, optical information recording device and optical information recording medium | Kenji Narumi, Kenichi Nishiuchi | 2006-10-03 |
| 7095705 | Optical information recording medium and optical information recording and reproducing apparatus | Kenichi Nishiuchi, Eiji Ohno, Nobuo Akahira | 2006-08-22 |
| 7002890 | High density analog recording using write symbols having distinguishable readout waveforms | Masud Mansuripur | 2006-02-21 |
| 6975579 | Optical information recording medium and optical information recording and reproducing apparatus | Kenichi Nishiuchi, Eiji Ohno, Nobuo Akahira | 2005-12-13 |
| 6893698 | Optical information recording medium, optical measuring method and optical information recording/reproducing method | Kenji Narumi, Kenichi Nishiuchi, Rie Kojima, Takashi Nishihara, Noboru Yamada | 2005-05-17 |
| 6744706 | Optical system with tracking controller | Yasuhiro Gotoh, Tetsuya Akiyama | 2004-06-01 |
| 6667937 | Optical information recording medium and optical information recording and reproducing apparatus | Kenichi Nishiuchi, Eiji Ohno, Nobuo Akahira | 2003-12-23 |
| 6532209 | Optical information recording medium and optical information recording and reproducing apparatus | Kenichi Nishiuchi, Eiji Ohno, Nobuo Akahira | 2003-03-11 |
| 6529457 | Optical information recording medium, optical information recording apparatus, and method of recording test signal on the same | Kenji Narumi | 2003-03-04 |
| 6526012 | Optical information recording medium, optical information recording apparatus, and method of recording test signal on the same | Kenji Narumi | 2003-02-25 |
| 6526013 | Optical information recording medium, optical information recording apparatus, and method of recording test signal on the same | Kenji Narumi | 2003-02-25 |
| 6510116 | Optical information recording/reproducing method and optical information recording/reproducing apparatus | Takashi Ishida, Junichi Minamino, Kenji Koishi, Shigeru Furumiya | 2003-01-21 |
| 6487147 | Optical information recording medium and an optical information recording/reproduction device | Yasuhiro Gotoh, Tetsuya Akiyama | 2002-11-26 |
| 6480449 | Optical information recording medium, optical information recording apparatus, and method of recording test signal on the same | Kenji Narumi | 2002-11-12 |
| 6411592 | OPTICAL INFORMATION RECORDING MEDIUM HAVING CONVEX AND CONCAVE PORTIONS FOR RECORDING INFORMATION AND AN ADDITIONAL PORTION FOR CONDITION DATA, AND RECORDING AND REPRODUCING APPARATUS FOR USING THE MEDIUM | Kenichi Nishiuchi, Eiji Ohno, Nobuo Akahira | 2002-06-25 |
| 6118752 | Optical information recording medium offset pre-pit array indicating identification information | Yasuhiro Gotoh | 2000-09-12 |
| 6044051 | Optical information recording/reproducing device and method for recording, reproducing and erasing information on an optical information recording medium utilizing light beam radiation | Mamoru Shoji, Takashi Ishida, Shigeru Furumiya, Yuji Hisakado | 2000-03-28 |
| RE36445 | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses | Yasuhiro Gotoh | 1999-12-14 |
| 5835479 | Optical information recording medium | Yoshito Aoki, Takashi Ishida, Shunji Ohara | 1998-11-10 |
| 5745475 | Optical information recording medium | Eiji Ohno, Kenichi Nishiuchi, Yoshitaka Sakaue, Kazuhisa Ide, Nobuo Akahira | 1998-04-28 |
| 5616390 | Optical recording medium permitting detection of identification signals in land areas and groove areas, optical information recording/reproducing apparatus and apparatus for producing an original disk for forming a disk substrate | Yasuhiro Gotoh | 1997-04-01 |
| 5475662 | Optical disc apparatus with tracking error compensation | Yasuhiro Gotoh | 1995-12-12 |