Issued Patents 2004
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6788876 | Information recording medium, information recording/reproduction system apparatus, and information recording/reproduction method | Kaoru Murase, Yoshihisa Fukushima, Tomoyuki Okada | 2004-09-07 |
| 6782487 | Information recording medium information recording method and information recording/reproduction system | Motoshi Ito, Hiroshi Ueda, Yoshihisa Fukushima | 2004-08-24 |
| 6778969 | Method and apparatus for encrypting and recording received content information on a recording medium using both medium identification information and a cipher key for encryption | Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi, Mitsurou Moriya, Yoshinari Takemura | 2004-08-17 |
| 6757391 | OPTICAL DISK, AN OPTICAL DISK BARCODE FORMING METHOD, AN OPTICAL DISK REPRODUCTION APPARATUS, A MARKING FORMING APPARATUS, A METHOD OF FORMING A LASER MARKING ON A OPTICAL DISK, AND A METHOD OF MANUFACTURING AN OPTICAL DISK | Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi, Mitsuro Moriya | 2004-06-29 |
| 6728882 | OPTICAL DISK, AN OPTICAL DISK BARCODE FORMING METHOD, AN OPTICAL DISK REPRODUCTION APPARATUS, A MARKING FORMING APPARATUS, A METHOD OF FORMING A LASER MARKING ON AN OPTICAL DISK, AND A METHOD OF MANUFACTURING AN OPTICAL DISK | Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi, Mitsuro Moriya | 2004-04-27 |