Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6819650 | Optical disc having land pre-pits and variable groove depths | Takayuki Deno, Kenichi Shimomai, Toyohito Asanuma, Fumitaka Tsuji | 2004-11-16 |
| 6816969 | Digital signature generating method and digital signature verifying method | Kunihiko Miyazaki, Ryoichi Sasaki, Kazuo Takaragi, Seiichi Susaki, Hisanori Mishima +3 more | 2004-11-09 |
| 6813357 | Exclusive key sharing method | Natsume Matsuzaki, Jun Anzai | 2004-11-02 |
| 6769063 | Data converter and recording medium on which program for executing data conversion is recorded | Masayuki Kanda, Youichi Takashima, Kazumaro Aoki, Hiroki Ueda, Kazuo Ohta | 2004-07-27 |