Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5621794 | Moving-picture encipherment method and system, and enciphered moving-picture decipherment method and system | Naoya Torii, Takayuki Hasebe, Noboru Iwayama, Masahiko Takenaka | 1997-04-15 |