Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6243726 | Electronic calculating apparatus utilizing input and display of expressions in textbook and single line formats | — | 2001-06-05 |
| 6142367 | Electronic device and method of displaying mathematical expressions including variables | Toshiro Oba, Fumiaki Kawawaki | 2000-11-07 |
| 5680638 | Mathematical expression input apparatus | — | 1997-10-21 |
| 5557718 | Information processing apparatus having a function of displaying a plurality of graphs | Katsumasa Tsuneyoshi | 1996-09-17 |
| 5519646 | Calculator with display of processing for mulas as processing progresses | Syuji Uemura, Yoshihiro Okuda, Syuuji Kaya, Toshiro Oba, Katsumasa Tsuneyoshi +2 more | 1996-05-21 |
| 5432721 | Device and method of displaying mathematical expression for small electronic appliance | — | 1995-07-11 |
| 5309380 | Computer display for input and display of improper and mixed fractions | Michiaki Kuno | 1994-05-03 |