Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7841001 | Authentication information management method for device embedded with microprocessor unit | Mitsuhiro Oikawa | 2010-11-23 |
| 7110548 | Cryptographic communication method, encryption algorithm shared control method, encryption algorithm conversion method and network communication system | Hirokazu Ougi, Hideo Takashima, Munetoshi Kouchi, Hiroshi Hayami, Hajime Asada +1 more | 2006-09-19 |
| 5051992 | Data link control method and system for integrated services digital network | Satoshi Miyazaki, Sinichi Kouyama, Tatsuo Kawatobi, Keizou Mizuguchi, Kazuo Yagyu | 1991-09-24 |
| 4879742 | Charging system in data communication network | Tatsuo Kawatobi | 1989-11-07 |