Issued Patents All Time
Showing 26–50 of 135 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6396798 | Optical disc with a rewritable area and a read-only area | Yoshinari Takemura, Shunji Ohara, Takashi Ishida, Kazuhiko Nakane, Masato Nagasawa +1 more | 2002-05-28 |
| 6373815 | Optical disc having oscillating lands and grooves | Takashi Ishida, Shin-ichi Tanaka, Akira Mutoh, Yoshinari Takemura, Shunji Ohara | 2002-04-16 |
| 6317407 | Optical disk having read-only and rewritable areas with overlapping formats | Yoshinari Takemura, Takashi Ishida, Shunji Ohara | 2001-11-13 |
| 6314078 | Recording defect substitution method for a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording medium | Yuji Takagi, Takahiro Nagai, Yoshihisa Fukushima, Shunji Ohara | 2001-11-06 |
| 6301220 | Recording defect substitution method for a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording medium | Yuji Takagi, Takahiro Nagai, Yoshihisa Fukushima, Shunji Ohara | 2001-10-09 |
| RE37185 | Optical head | Sadao Mizumo, Noboru Itoh | 2001-05-22 |
| 6175549 | Recording defect substitution method of a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording medium | Yuji Takagi, Takahiro Nagai, Yoshihisa Fukushima, Shunji Ohara | 2001-01-16 |
| 6167022 | Optical disc having oscillating land and grooves | Takashi Ishida, Shin-ichi Tanaka, Akira Mutoh, Yoshinari Takemura, Shunji Ohara | 2000-12-26 |
| 6160770 | Information recording method, information recording/reproducing apparatus, and information recording medium | Shunji Ohara, Takashi Ishida, Yoshikazu Goto | 2000-12-12 |
| 6137768 | Optical disc having oscillating lands and grooves | Takashi Ishida, Shin-ichi Tanaka, Akira Mutoh, Yoshinari Takemura, Shunji Ohara | 2000-10-24 |
| 6134214 | Method for substituting defective recording of discoid recording medium and discoid recording medium recording and reproducing device | Yuji Takagi, Takahiro Nagai, Yoshihisa Fukushima, Shunji Ohara | 2000-10-17 |
| 6097683 | Information recording/reproducing apparatus and a method of recording information onto an information recording/reproducing media having a plurality of storage medium types and recording modes | Shunji Ohara, Takashi Ishida, Yoshikazu Goto | 2000-08-01 |
| 6078559 | Optical disk having read-only and rewritable areas with overlapping formats | Yoshinari Takemura, Takashi Ishida, Shunji Ohara | 2000-06-20 |
| 6038209 | Optical disk, and information recording/reproduction apparatus | — | 2000-03-14 |
| 6021101 | Optical disk, and information recording/reproduction apparatus | — | 2000-02-01 |
| 5933410 | Optical disc and optical disc driving apparatus | Kazuhiko Nakane, Hiroyuki Ohata, Masato Nagasawa, Kenji Gotoh, Yoshinobu Ishida +3 more | 1999-08-03 |
| 5923640 | Optical disc with a rewritable area and a read-only area | Yoshinari Takemura, Shunji Ohara, Takashi Ishida, Kazuhiko Nakane, Masato Nagasawa +1 more | 1999-07-13 |
| 5920540 | Optical disk having address information in lands and grooves, and an information recording/reproduction method | — | 1999-07-06 |
| 5883878 | Method of manufacturing a multilayered optical disc | Yoshihisa Fukushima, Yuji Takagi, Yasushi Azumatani, Hiroshi Hamasaka | 1999-03-16 |
| 5872767 | Optical disk and an optical disk recording/reproduction device having address blocks located on boundary lines between adjoining tracks | Takahiro Nagai, Yuji Takagi, Yuji Hisakado, Yoshito Aoki, Shunji Ohara +1 more | 1999-02-16 |
| 5872750 | Optical disk, and information recording/reproduction apparatus | — | 1999-02-16 |
| 5870374 | Multi-layer optical disc having a pair of substrates spaced by an adhesive material | Yoshihisa Fukushima, Yuji Takagi, Yasushi Azumatani, Hiroshi Hamasaka | 1999-02-09 |
| 5862112 | Optical disk and an optical disk recording reproduction device | Takahiro Nagai, Yuji Takagi, Yuji Hisakado, Yoshito Aoki, Shunji Ohara +1 more | 1999-01-19 |
| 5850382 | Optical disk having a rewritable area and a read-only area | Kenji Koishi, Shunji Ohara, Takashi Ishida, Yoshinari Takemura, Toyoji Gushima +2 more | 1998-12-15 |
| 5838658 | Optical disc | Kazuhiko Nakane, Hiroyuki Ohata, Masato Nagasawa, Kenji Gotoh, Yoshinobu Ishida +3 more | 1998-11-17 |