Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5390252 | Authentication method and communication terminal and communication processing unit using the method | Shigefusa Suzuki | 1995-02-14 |
| 5377267 | Method of authentication with improved security for secrecy of authentication key | Shigefusa Suzuki | 1994-12-27 |
| 5251248 | Telephone network having personal numbers for position-independent | Hiroshi Tokunaga, Noriaki Yoshikawa, Takeshi Hattori, Hidetsugu Kobayashi, Yoshiyuki Yasuda | 1993-10-05 |