Issued Patents 2002
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6496455 | 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 | 2002-12-17 |
| 6452884 | Information recording method, information recording/reproducing apparatus, and information recording medium | Shunji Ohara, Takashi Ishida, Yoshikazu Goto | 2002-09-17 |
| 6451961 | Ethylenimine polymer, aqueous solution of ethylenimine polymer, production process for the same and purifying process therefor | Seiichi Suzuki, Yoshiyuki Onda | 2002-09-17 |
| 6444769 | Production process for ethylenimine polymer aqueous solution | Seiichi Suzuki, Yoshiyuki Onda | 2002-09-03 |
| 6430129 | Information recording method, information recording/reproducing apparatus, and information recording medium | Shunji Ohara, Takashi Ishida, Yoshikazu Goto | 2002-08-06 |
| 6421315 | Multi-layered optical disk with shifted track and layer identification and method of detecting a track | Yoshihisa Fukushima, Yuji Takagi, Yasushi Azumatani, Hiroshi Hamasaka | 2002-07-16 |
| 6418111 | Optical disk compatible with read-only disk and having read-only and rewritable areas with overlapping formats | Yoshinari Takemura, Takashi Ishida, Shunji Ohara | 2002-07-09 |
| 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 |