Issued Patents 2003
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6654883 | Device authentication and encrypted communication system offering increased security | — | 2003-11-25 |
| 6606707 | Semiconductor memory card | Teruto Hirota, Taihei Yugawa, Masataka Minami, Masayuki Kozuka | 2003-08-12 |
| 6581160 | Revocation information updating method, revocation information updating apparatus and storage medium | Shunji Harada, Masayuki Kozuka, Teruto Hirota, Toru Kamibayashi, Masafumi Tamura | 2003-06-17 |
| 6550009 | Encryption system for distributing a common crypt key | Sachiko Uranaka, Masaki Kiyono | 2003-04-15 |
| 6539468 | Data copying system, data copying method, data reading apparatus, data writing apparatus and data recording medium | Mitsuhiro Inoue, Shunji Harada, Masayuki Kozuka, Yoshihisa Fukushima, Mitsuhiko Serikawa | 2003-03-25 |