Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6691310 | Information receiver and information transmission and reception method providing information usage status | Shigeki Hirasawa, Yuichi Yagawa, Michio Morioka, Toru Yamada, Nobukage Takahashi | 2004-02-10 |
| 4904851 | Identification authenticating system | — | 1990-02-27 |