Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6850914 | Revocation information updating method, revocation informaton updating apparatus and storage medium | Shunji Harada, Makoto Tatebayashi, Masayuki Kozuka, Teruto Hirota, Masafumi Tamura | 2005-02-01 |
| 6847950 | Contents managing method and contents managing apparatus | Masafumi Tamura, Taku Kato, Yasuhiro Ishibashi, Hisashi Yamada, Hideyuki Toma | 2005-01-25 |