Issued Patents All Time
Showing 26–50 of 67 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5956308 | Data storage apparatus | Kenichi Nishiuchi, Eiji Ohno, Kenichi Nagata, Noboru Yamada | 1999-09-21 |
| 5898394 | Code conversion method and apparatus, code recording medium, code recording apparatus and code reproducing apparatus | Yoshiharu Kobayashi, Akira Mutoh, Shin-ichi Tanaka | 1999-04-27 |
| 5883720 | Method of measuring a film thickness of multilayer thin film | Tetsuya Akiyama, Eiji Ohno | 1999-03-16 |
| 5811217 | Optical information recording medium and optical information recording/reproducing method | Kenichi Nagata, Eiji Ohno, 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 | Kenichi Nishiuchi, Eiji Ohno, Kenichi Nagata, Noboru Yamada | 1998-06-16 |
| 5764619 | Optical recording medium having two separate recording layers | Kenichi Nishiuchi, Ken'ichi Nagata | 1998-06-09 |
| 5745475 | Optical information recording medium | Eiji Ohno, Kenichi Nishiuchi, Yoshitaka Sakaue, Kazuhisa Ide, Naoyasu Miyagawa | 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 | Kenichi Nishiuchi, Eiji Ohno, 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, Eiji Ohno, Kenichi Nagata +1 more | 1997-06-03 |
| 5568461 | Optical information recording and reproducing apparatus | Kenichi Nishiuchi, Noyasu Miyagawa, Eiji Ohno | 1996-10-22 |
| 5545454 | Optical information recording medium and method of designing its structure | Noboru Yamada, Kenichi Nishiuchi, Kenichi Nagata, Eiji Ohno, Shigeaki Furukawa | 1996-08-13 |
| 5527661 | Optical information recording medium | Eiji Ohno, 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, Noboru Yamada, Eiji Ohno | 1996-05-14 |
| 5493561 | Optical information recording medium and information recording and reproducing method thereof | Kenichi Nishiuchi, Noboru Yamada, Eiji Ohno, Ken'ichi Nagata | 1996-02-20 |
| 5491003 | Method for manufacturing an optical recording film composed of a metal and an oxide which can undergo an oxidation-reduction reaction upon exposure to a laser beam | — | 1996-02-13 |
| 5459018 | Optical information recording medium, a manufacturing method thereof and an optical information recording and reproducing method using the medium | — | 1995-10-17 |
| 5424106 | Optical information recording medium and method of designing its structure | Noboru Yamada, Kenichi Nishiuchi, Kenichi Nagata, Eiji Ohno, Shigeaki Furukawa | 1995-06-13 |
| 5412626 | Method of recording optical information with selective correction in pulse waveform and a recording system therefor | Eiji Ohno, Kenichi Nishiuchi, Kenichi Nagata, Noboru Yamada | 1995-05-02 |
| 5410534 | Optical information recording medium | Ken'ichi Nagata, Eiji Ohno, Ken'ichi Nishiuchi, Noboru Yamada | 1995-04-25 |
| 5348783 | Optical information recording medium | Eiji Ohno, Noboru Yamada, Kenichi Nagata, Kenichi Nishiuchi | 1994-09-20 |
| 5346740 | Optical information recording medium | Eiji Ohno, Noboru Yamada, Kenichi Nagata, Kenichi Nishiuchi | 1994-09-13 |
| 5305303 | Optical information recording medium | Eiji Ohno, Kenichi Nishiuchi, Kenichi Nagata, Noboru Yamada | 1994-04-19 |
| 5305297 | Method for determining optimum irradiation conditions in optical data recording | Kenichi Nishiuchi, Eiji Ohno, Noboru Yamada | 1994-04-19 |
| 5289453 | Optical information recording method | Eiji Ohno, Kenichi Nishiuchi, Noboru Yamada | 1994-02-22 |
| 5272667 | Optical information recording apparatus for recording optical information in a phase change type optical recording medium and method therefor | Noboru Yamada, Kenichi Nishiuchi, Eiji Ohno | 1993-12-21 |