Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6816969 | Digital signature generating method and digital signature verifying method | Kunihiko Miyazaki, Ryoichi Sasaki, Seiichi Susaki, Hisanori Mishima, Takeshi Matsuki +3 more | 2004-11-09 |
| 6731509 | Method for mounting electronic circuit chip | Chikashi Okamoto, Kazutaka Tsuji, Mitsuo Usami, Chizuko Yasunobu, Asahiko Sobe +2 more | 2004-05-04 |
| 6714648 | IC card equipped with elliptic curve encryption processing facility | Seiji Miyazaki | 2004-03-30 |
| 6683956 | Encrypting conversion apparatus, decrypting conversion apparatus, cryptographic communication system, and electronic toll collection apparatus | Makoto Aikawa, Shigeru Hirahata, Yoshimichi Kudo | 2004-01-27 |