Issued Patents All Time
Showing 26–50 of 51 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6270611 | Multi-layer recording medium and method for producing same | Hiroshi Ohki, Motohiro Furuki | 2001-08-07 |
| 6246656 | Reduced thickness of a light transmissive layer for a high density optical disc | Osamu Kawakubo, Koichi Yasuda, Masahiko Kaneko | 2001-06-12 |
| 6242066 | Optical recording medium, optical recording and reproducing apparatus using the same and manufacturing method of optical recording medium | Takeshi Yamasaki, Tomomi Yukumoto, Motohiro Furuki | 2001-06-05 |
| 6210609 | Method of manufacturing optical recording medium | Minoru Takeda, Nobuyuki Arakawa | 2001-04-03 |
| 6207355 | Optical recording medium and method for producing same | Yoshiaki Kato | 2001-03-27 |
| 6201783 | Optical recording medium having substrate of dual transparent layers | Nobuyuki Arakawa, Masanobu Yamamoto, Yuji Akiyama | 2001-03-13 |
| 6175548 | Optical recording medium and optical recording and reproducing apparatus | — | 2001-01-16 |
| 6136402 | Optical recording medium having disconnected lands and grooves forming control signal portion | Shingo Imanishi, Masanobu Yamamoto | 2000-10-24 |
| 6118574 | Exposure apparatus | Shingo Imanishi, Shin Masuhara, Hisayuki Yamatsu | 2000-09-12 |
| 6111851 | Optical recording medium and method of manufacturing same | Hiroshi Ohki | 2000-08-29 |
| 6078560 | Optical recording medium and optical recording/reproducing apparatus | — | 2000-06-20 |
| 6069868 | Multiple layer optical disk storing information at a like multiple densities | — | 2000-05-30 |
| 6063468 | Optical recording medium | Katsuhisa Aratani, Minoru Kikuchi | 2000-05-16 |
| 6023451 | Optical recording medium and optical disk apparatus | Osamu Kawakubo, Ariyoshi Nakaoki, Masahiko Kaneko | 2000-02-08 |
| 6016302 | Optical disc and method for producing same | Hisayuki Yamatsu, Shingo Imanishi, Shin Masuhara | 2000-01-18 |
| 5972459 | Optical recording medium and optical disk apparatus | Osamu Kawakubo, Koichi Yasuda, Masahiko Kaneko, Mitsuo Naito, Motohiro Furuki | 1999-10-26 |
| 5933409 | Optical recording medium and method for producing same | Yoshiaki Kato | 1999-08-03 |
| 5852329 | Optical disc molding device and molding method for optical disc | Nobuyuki Arakawa, Asao Kurosu, Yuji Akiyama, Shinsuke Kishi | 1998-12-22 |
| 5846626 | Optical recording medium and method of producing same | Motohiro Furuki, Shoji Fukuchi, Yoshitake Yanagisawa | 1998-12-08 |
| 5818805 | Reproducing apparatus using an information recording medium wherein multi-bit digital information is represented by a shift amount of a pit edge | Seiji Kobayashi, Hiroshige Okamura, Hisayuki Yamatsu | 1998-10-06 |
| 5748582 | Information recording medium wherein digital symbols are represented by discrete shift amounts of a pit edge and tracking wobbling pits are shared between adjacent tracks and information recording and reproducing apparatus therefor | Seiji Kobayashi, Hiroshige Okamura, Hisayuki Yamatsu | 1998-05-05 |
| 5724330 | Information recording medium wherein multi-bit digital information is represented by a shift amount of a pit edge, recording apparatus, reproducing apparatus, and recording and reproducing apparatus therefor | Seiji Kobayashi, Hiroshige Okamura, Hisayuki Yamatsu | 1998-03-03 |
| 5708652 | Multi-layer recording medium and method for producing same | Hiroshi Ohki, Motohiro Furuki | 1998-01-13 |
| 5238786 | Method for manufacturing high recording density optical disk | — | 1993-08-24 |
| 5230770 | Making method for high-density optical disk | — | 1993-07-27 |