Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4794554 | Electronic calculator having a graph display function | — | 1988-12-27 |
| 4761750 | Electronic calculator with a program calculation function | Hiroyuki Yoshino | 1988-08-02 |
| 4749982 | Intelligent card | Kenji Rikuna, Harumi Nakano, Kazuya Hara, Yoshimi Shigenaga, Hiroyasu Bito +1 more | 1988-06-07 |