Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5732001 | Calculator with stepwise display of linear equations | Hitoshi Nakayama | 1998-03-24 |
| 5519646 | Calculator with display of processing for mulas as processing progresses | Yoshihiro Okuda, Syuuji Kaya, Toshiro Oba, Akiyoshi Satoh, Katsumasa Tsuneyoshi +2 more | 1996-05-21 |