Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5739823 | Graph display devices | Shunsuke Akaza, Hidekazu Tanaka, Makoto Ozawa, Kazuhiko Arikawa | 1998-04-14 |
| 5539867 | Graph display apparatus for displaying different graphs of a functional formula based on inputted coefficient data | Yukihiro Nakano, Kazuhiko Arikawa, Osamu Negishi | 1996-07-23 |
| 5303338 | Compact electronic apparatus equipped with graphic representing function | Osamu Negishi | 1994-04-12 |