Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6477649 | Information recording apparatus, information reproducing apparatus, and information distribution system | Toru Kambayashi, Koichiro Akiyama, Kazuo Sumita, Hideki Hirakawa, Toshihiro Sugaya | 2002-11-05 |
| 6463155 | Broadcast reception device and contract management device using common master key in conditional access broadcast system | Koichiro Akiyama, Toru Kambayashi, Naoki Endoh | 2002-10-08 |
| 6345245 | Method and system for managing a common dictionary and updating dictionary data selectively according to a type of local processing system | Hiroshi Sugiyama, Kazuhiro Kimura | 2002-02-05 |