Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5396558 | Method and apparatus for settlement of accounts by IC cards | Ginya Ishiguro, Toshiyasu Muta, Kazutaka Sakita, Shoji Miyaguchi, Atsushi Fujioka | 1995-03-07 |
| 5224162 | Electronic cash system | Kazuo Ohta | 1993-06-29 |
| 4977595 | Method and apparatus for implementing electronic cash | Kazuo Ohta | 1990-12-11 |
| 4969189 | Authentication system and apparatus therefor | Kazuo Ohta | 1990-11-06 |
| 4625076 | Signed document transmission system | Shoji Miyaguchi, Akira Shiraishi, Tsukasa Kawaoka | 1986-11-25 |