Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6615192 | Contents copying system, copying method, computer-readable recording medium and disc drive copying contents but not a cipher key via a host computer | Kenji Tagawa, Shunji Harada, Masayuki Kozuka, Shoichi Aoyama, Yukako Ohtani +1 more | 2003-09-02 |
| 6539468 | Data copying system, data copying method, data reading apparatus, data writing apparatus and data recording medium | Shunji Harada, Masayuki Kozuka, Makoto Tatebayashi, Yoshihisa Fukushima, Mitsuhiko Serikawa | 2003-03-25 |