Issued Patents All Time
Showing 51–75 of 103 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6447869 | Optical information recording medium and method for producing the same | Hidemi Isomura, Akihiro Moteki | 2002-09-10 |
| 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, Nobuo Akahira | 2002-06-25 |
| 6291046 | Optical information recording medium and method for producing the same | Hidemi Isomura, Akihiro Moteki | 2001-09-18 |
| 6261661 | Optical information recording medium and method for producing the same | Hidemi Isomura, Akihiro Moteki | 2001-07-17 |
| 6165578 | Optical information recording medium and method for producing the same | Hidemi Isomura, Akihiro Moteki | 2000-12-26 |
| 6146734 | Optical recording disk and method for manufacturing the same | Yoshitaka Sakaue, Kenichi Nagata, Nobuo Akahira, Masahide Yokoyama, Hiroshi Hayata +1 more | 2000-11-14 |
| 6143469 | Optical information recording medium and manufacturing method | Hiroyuki Ohta, Yoshitaka Sakaue, Noboru Yamada | 2000-11-07 |
| 6033535 | Optical information recording disk and method for manufacturing the same | Yoshitaka Sakaue, Kenichi Nagata, Nobuo Akahira, 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, Nobuo Akahira, Kenji Narumi | 2000-02-29 |
| 5989654 | Method for manufacturing an optical information recording medium | Kazumi Yoshioka, Hidemi Isomura, Hiroyuki Ohta | 1999-11-23 |
| 5956308 | Data storage apparatus | Nobuo Akahira, Kenichi Nishiuchi, Kenichi Nagata, Noboru Yamada | 1999-09-21 |
| 5914214 | Method for manufacturing an optical information recording medium | Hiroyuki Ohta, Yoshitaka Sakaue, Noboru Yamada | 1999-06-22 |
| 5883720 | Method of measuring a film thickness of multilayer thin film | Tetsuya Akiyama, Nobuo Akahira | 1999-03-16 |
| 5865961 | Magnetron sputtering apparatus and method | Masahide Yokoyama, Hiroshi Hayata, Seiichiro Mori, Toshiyuki Suemitsu | 1999-02-02 |
| 5811217 | Optical information recording medium and optical information recording/reproducing method | Nobuo Akahira, Kenichi Nagata, Kenichi Nishiuchi, Noboru Yamada | 1998-09-22 |
| 5768233 | Data storage apparatus for recording and reproducing information on a recording medium by rotating the medium at different zone recording angular velocities and a reading angular velocity during a stand-by mode | Nobuo Akahira, Kenichi Nishiuchi, Kenichi Nagata, Noboru Yamada | 1998-06-16 |
| 5750228 | Optical information storage medium | Yoshitaka Sakaue, Kazuhisa Ide, Kenichi Nagata, Noboru Yamada | 1998-05-12 |
| 5745467 | Optical information recording method and apparatus | Yoshitaka Sakaue, Kenichi Nishiuchi | 1998-04-28 |
| 5745475 | Optical information recording medium | Kenichi Nishiuchi, Yoshitaka Sakaue, Kazuhisa Ide, Naoyasu Miyagawa, Nobuo Akahira | 1998-04-28 |
| 5729513 | Data storage apparatus for recording and reproducing information on a recording medium by rotating the recording medium at different angular velocities | Nobuo Akahira, Kenichi Nishiuchi, Kenichi Nagata, Noboru Yamada | 1998-03-17 |
| 5635267 | Optical information recording medium of phase change type having variably grooved tracks depending on their radial locations | Noboru Yamada, Kenichi Nishiuchi, Shigeaki Furukawa, Nobuo Akahira, Kenichi Nagata +1 more | 1997-06-03 |
| 5568461 | Optical information recording and reproducing apparatus | Kenichi Nishiuchi, Noyasu Miyagawa, Nobuo Akahira | 1996-10-22 |
| 5545454 | Optical information recording medium and method of designing its structure | Noboru Yamada, Nobuo Akahira, Kenichi Nishiuchi, Kenichi Nagata, Shigeaki Furukawa | 1996-08-13 |
| 5527661 | Optical information recording medium | Nobuo Akahira, Kenichi Nishiuchi, Kenichi Nagata, Yoshitaka Sakaue, Noboru Yamada | 1996-06-18 |
| 5517485 | Optical information recording medium having first and second tracks and apparatus for recording to and reproducing from the medium | Kenichi Nishiuchi, Nobuo Akahira, Noboru Yamada | 1996-05-14 |