Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6922775 | User support system for cryptographic communication in network systems | Hiroaki Kikuchi, Hideyuki Aikawa | 2005-07-26 |
| 6915434 | Electronic data storage apparatus with key management function and electronic data storage method | Jun Kamada, Shoko Iwase, Bintatsu Noda, Etsuo Ono | 2005-07-05 |
| 6658403 | Apparatus and method for managing electronic original data | Takashi Yoshioka, Etsuo Ono | 2003-12-02 |
| 6584563 | User support system for cryptographic communication in network systems | Hiroaki Kikuchi, Hideyuki Aikawa | 2003-06-24 |
| 6505213 | File management apparatus and method | Jun Kamada, Etsuo Ono | 2003-01-07 |
| 6470448 | Apparatus and method for proving transaction between users in network environment | Masahiro Komura, Satoru Torii, Shoko Iwase, Etsuo Ono | 2002-10-22 |
| 6421779 | Electronic data storage apparatus, system and method | Jun Kamada, Etsuo Ono | 2002-07-16 |
| 6345360 | Apparatus method and computer readable storage medium with recorded program for managing files with alteration preventing/detecting functions | Jun Kamada, Etsuo Ono | 2002-02-05 |
| 6272225 | Key recovery condition encryption and decryption apparatuses | Hiroshi Miyauchi, Kazue Sako, Masashi Yamazaki, Seiichi Domyo, Hiroyoshi Tsuchiya +4 more | 2001-08-07 |
| 6266421 | Key recovery system and key recovery method | Seiichi Domyo, Hiroyoshi Tsuchiya, Seiko Kanno, Hiroyuki Ando, Ichirou Morita +4 more | 2001-07-24 |
| 6260145 | System and method of authentication of digital information | Masahiro Komura, Etsuo Ono, Satoru Torii | 2001-07-10 |
| 6185308 | Key recovery system | Hiroyuki Ando, Ichirou Morita, Naoya Torii, Masashi Yamazaki, Hiroshi Miyauchi +4 more | 2001-02-06 |
| 5935248 | Security level control apparatus and method for a network securing communications between parties without presetting the security level | — | 1999-08-10 |
| 5642420 | Cryptoinformation repeater, subscriber terminal connected thereto, and cryptocommunication method | Hiroaki Kikuchi | 1997-06-24 |