Issued Patents All Time
Showing 126–150 of 169 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5385806 | Optical information recording medium | Eiji Ohno, Masatoshi Takao | 1995-01-31 |
| 5348783 | Optical information recording medium | Eiji Ohno, Kenichi Nagata, Kenichi Nishiuchi, Nobuo Akahira | 1994-09-20 |
| 5346740 | Optical information recording medium | Eiji Ohno, Kenichi Nagata, Kenichi Nishiuchi, Nobuo Akahira | 1994-09-13 |
| 5305303 | Optical information recording medium | Nobuo Akahira, Eiji Ohno, Kenichi Nishiuchi, Kenichi Nagata | 1994-04-19 |
| 5305297 | Method for determining optimum irradiation conditions in optical data recording | Kenichi Nishiuchi, Eiji Ohno, Nobuo Akahira | 1994-04-19 |
| 5294523 | Optical information recording medium | Ken'chi Nagata, Susumu Sanai, Masatoshi Takao | 1994-03-15 |
| 5291470 | Optical information recording method | Kenichi Nishiuchi | 1994-03-01 |
| 5289453 | Optical information recording method | Eiji Ohno, Kenichi Nishiuchi, Nobuo Akahira | 1994-02-22 |
| 5278011 | Reversible optical information-recording medium | Kunio Kimura, Masatoshi Takao, Susumu Sanai | 1994-01-11 |
| 5273861 | Optical information recording medium, method of making an optical information recording medium and method of recording/reproducing optical information | Ken'ichi Nagata, Kenichi Nishiuchi | 1993-12-28 |
| 5272667 | Optical information recording apparatus for recording optical information in a phase change type optical recording medium and method therefor | Kenichi Nishiuchi, Eiji Ohno, Nobuo Akahira | 1993-12-21 |
| 5255260 | Optical recording apparatus employing stacked recording media with spiral grooves and floating optical heads | Isao Satoh, Sadao Mizuno, Yasuhiro Gotoh | 1993-10-19 |
| 5247494 | Method for recording and reproducing information on and from an optical disk having a read-only recorded zone and a writable and readable zone using a spot laser light | Eiji Ohno | 1993-09-21 |
| 5233599 | Optical disk with a recording layer composed of tellurium, antimony, and germanium | Eiji Ohno, Kenichi Nishiuchi, Nobuo Akahira | 1993-08-03 |
| 5231617 | Optical information recording and reproducing apparatus and method of recording and reproducing information in an optical disk unit | Isao Satoh, Sadao Mizuno, Yasuhiro Gotoh | 1993-07-27 |
| 5216657 | Method and apparatus for timing variable optical information recording | Kenichi Nishiuchi, Nobuo Akahira, Kazutoyo Hirosawa, Tomio Yoshida, Shinji Kubota | 1993-06-01 |
| 5154957 | Optical information recording medium | Kenichi Nishiuchi, Eiji Ohno, Kenichi Nagata, Nobuo Akahira | 1992-10-13 |
| 5153866 | Optical disc recording-reproducing apparatus for determining the last recorded sensor | Isao Satoh | 1992-10-06 |
| 5150351 | Optical information recording apparatus for recording an input signal having variable width pulse duration and pulse spacing periods | Eiji Ohno, Kenichi Nishiuchi, Kenzou Ishibashi, Kunio Kimura, Nobuo Akahira | 1992-09-22 |
| 5130971 | Optical disk and optical information recording method | Eiji Ohno, Kenichi Nishiuchi, Nobuo Akahira | 1992-07-14 |
| 5109373 | Optical information recording method | Eiji Ohno, Kenichi Nishiuchi, Kenzou Ishibashi, Kunio Kimura, Nobuo Akahira | 1992-04-28 |
| 4980879 | Optical information recording and erasing method using two laser beams on a phase change optical recording medium | Kenichi Nishiuchi, Eiji Ohno | 1990-12-25 |
| 4939013 | Optical information storing medium | Kunio Kimura, Susumu Sanai, Eiji Ohno | 1990-07-03 |
| 4939717 | Method and apparatus for erasing and recording information using three power levels | Eiji Ohno, Kenichi Nishiuchi | 1990-07-03 |
| 4935336 | Optical recording medium | Kenichi Nishiuchi, Mutsuo Takenaga | 1990-06-19 |