Issued Patents All Time
Showing 126–144 of 144 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5289453 | Optical information recording method | Eiji Ohno, Noboru Yamada, Nobuo Akahira | 1994-02-22 |
| 5273861 | Optical information recording medium, method of making an optical information recording medium and method of recording/reproducing optical information | Noboru Yamada, Ken'ichi Nagata | 1993-12-28 |
| 5272667 | Optical information recording apparatus for recording optical information in a phase change type optical recording medium and method therefor | Noboru Yamada, Eiji Ohno, Nobuo Akahira | 1993-12-21 |
| 5249175 | Optical information recording medium and information recording and reproducing method therefor | Nobuo Akahira, Ken'ichi Nagata | 1993-09-28 |
| 5233599 | Optical disk with a recording layer composed of tellurium, antimony, and germanium | Eiji Ohno, Noboru Yamada, Nobuo Akahira | 1993-08-03 |
| 5216657 | Method and apparatus for timing variable optical information recording | Noboru Yamada, Nobuo Akahira, Kazutoyo Hirosawa, Tomio Yoshida, Shinji Kubota | 1993-06-01 |
| 5154957 | Optical information recording medium | Noboru Yamada, Eiji Ohno, Kenichi Nagata, Nobuo Akahira | 1992-10-13 |
| 5150351 | Optical information recording apparatus for recording an input signal having variable width pulse duration and pulse spacing periods | Eiji Ohno, Noboru Yamada, Kenzou Ishibashi, Kunio Kimura, Nobuo Akahira | 1992-09-22 |
| 5130971 | Optical disk and optical information recording method | Eiji Ohno, Noboru Yamada, Nobuo Akahira | 1992-07-14 |
| 5109373 | Optical information recording method | Eiji Ohno, Noboru Yamada, Kenzou Ishibashi, Kunio Kimura, Nobuo Akahira | 1992-04-28 |
| 5097464 | Optical recording medium and optical recording/reproducing apparatus | Nobuo Akahira | 1992-03-17 |
| 4980879 | Optical information recording and erasing method using two laser beams on a phase change optical recording medium | Noboru Yamada, Eiji Ohno | 1990-12-25 |
| 4939717 | Method and apparatus for erasing and recording information using three power levels | Eiji Ohno, Noboru Yamada | 1990-07-03 |
| 4935336 | Optical recording medium | Noboru Yamada, Mutsuo Takenaga | 1990-06-19 |
| 4916048 | Optical recording medium and method of optical recording and erasing using medium | Noboru Yamada, Mutsuo Takenaga | 1990-04-10 |
| 4908835 | Information recording medium | Nobuo Akahira, Noboru Yamada, Eiji Ohno | 1990-03-13 |
| 4710911 | Method for recording, reproducing and erasing optical information | Noboru Yamada, Michiyoshi Nagashima | 1987-12-01 |
| 4383029 | Recording medium and recording system | Noboru Yamada, Mutsuo Takenaga | 1983-05-10 |
| 4264551 | Recorded disk reproducing system | Hajimu Oonishi, Tadaoki Yamashita | 1981-04-28 |