Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5623548 | Transformation pattern generating device and encryption function device | Ryota Akiyama, Noboru Iwayama, Kenichi Utsumi | 1997-04-22 |
| 5621794 | Moving-picture encipherment method and system, and enciphered moving-picture decipherment method and system | Masahiro Matsuda, Takayuki Hasebe, Noboru Iwayama, Masahiko Takenaka | 1997-04-15 |