Issued Patents All Time
Showing 1–25 of 67 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE39771 | Code conversion method and apparatus, code recording medium, code recording apparatus and code reproducing apparatus | Yoshiharu Kobayashi, Akira Mutoh, Shin-ichi Tanaka | 2007-08-14 |
| 7136349 | Multi-layer optical information recording medium with pits or grooves | Kenichi Nishiuchi, Ken'ichi Nagata | 2006-11-14 |
| 7123570 | Recording/reproducing apparatus with optical path correction system | Tetsuya Akiyama, Kenichi Nishiuchi | 2006-10-17 |
| 7116631 | Optical information recording medium manfacturing method therefor, manufacturing apparatus therefor, and optical information recording and reproducing apparatus | Kenichi Nishiuchi, Ken'ichi Nagata | 2006-10-03 |
| 7095705 | Optical information recording medium and optical information recording and reproducing apparatus | Kenichi Nishiuchi, Naoyasu Miyagawa, Eiji Ohno | 2006-08-22 |
| 7075870 | Recording/reproducing apparatus for optical information recording medium and optical head | Tetsuya Akiyama, Kenichi Nishiuchi | 2006-07-11 |
| 6975579 | Optical information recording medium and optical information recording and reproducing apparatus | Kenichi Nishiuchi, Naoyasu Miyagawa, Eiji Ohno | 2005-12-13 |
| 6771587 | Optical information recording medium with plural information layers | Kenichi Nishiuchi, Ken'ichi Nagata | 2004-08-03 |
| 6744724 | Recording and reproducing method for optical information recording medium and optical information recording medium | Ken'ichi Nagata, Noboru Yamada, Kenichi Nishiuchi | 2004-06-01 |
| 6707776 | Recording and reproducing method of optical information recording medium | Ken'ichi Nagata, Kenichi Nishiuchi, Eiji Ohno, Kenji Narumi | 2004-03-16 |
| 6697313 | Optical information recording and reproducing system with overwrite capability and recording medium for use therewith | Ken'ichi Nagata, Kenichi Nishiuchi, Eiji Ohno, Kenji Narumi | 2004-02-24 |
| 6683739 | Optical information recording and reproducing system with overwrite capability and recording medium for use therewith | Ken'ichi Nagata, Kenichi Nishiuchi, Eiji Ohno, Kenji Narumi | 2004-01-27 |
| 6667937 | Optical information recording medium and optical information recording and reproducing apparatus | Kenichi Nishiuchi, Naoyasu Miyagawa, Eiji Ohno | 2003-12-23 |
| 6611491 | Optical recording medium having dual recording layers | Kenichi Nishiuchi, Ken'ichi Nagata | 2003-08-26 |
| 6587420 | Recording and reproducing method for optical information recording medium and optical information recording medium | Ken'ichi Nagata, Noboru Yamada, Kenichi Nishiuchi | 2003-07-01 |
| 6532209 | Optical information recording medium and optical information recording and reproducing apparatus | Kenichi Nishiuchi, Naoyasu Miyagawa, Eiji Ohno | 2003-03-11 |
| 6487151 | Optical information recording and reproducing system with overwrite capability and recording medium for use therewith | Ken'ichi Nagata, Kenichi Nishiuchi, Eiji Ohno, Kenji Narumi | 2002-11-26 |
| 6456584 | Optical information recording medium comprising a first layer having a phase that is reversibly changeable and a second information layer having a phase that is reversibly changeable | Ken'ichi Nagata, Kenichi Nishiuchi, Noboru Yamada | 2002-09-24 |
| 6434095 | Optical information recording medium, manufacturing method therefor, manufacturing apparatus therefor, and optical information recording and reproducing apparatus | Kenichi Nishiuchi, Ken'ichi Nagata | 2002-08-13 |
| 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, Naoyasu Miyagawa, Eiji Ohno | 2002-06-25 |
| 6226239 | Optical information recording and reproducing apparatus for multiple layer recording medium | Kenichi Nishiuchi, Ken'ichi Nagata | 2001-05-01 |
| 6146734 | Optical recording disk and method for manufacturing the same | Eiji Ohno, Yoshitaka Sakaue, Kenichi Nagata, Masahide Yokoyama, Hiroshi Hayata +1 more | 2000-11-14 |
| 6033535 | Optical information recording disk and method for manufacturing the same | Eiji Ohno, Yoshitaka Sakaue, Kenichi Nagata, Masahide Yokoyama, Hiroshi Hayata +1 more | 2000-03-07 |
| 6031814 | Optical disk with stop-pulse generating means in a guide groove | Ken'ichi Nagata, Kenichi Nishiuchi, Eiji Ohno, Kenji Narumi | 2000-02-29 |
| 6027594 | Method of manufacturing optical information recording medium | Kenichi Nishiuchi, Ken'ichi Nagata | 2000-02-22 |