Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4340375 | Electronic learning aid | Takashi Sakaue, Koichi Hatta, Megumi Fukusaki | 1982-07-20 |
| 4321046 | Electronic learning aid operable in an examination mode | Koiti Oda, Takashi Sakaue | 1982-03-23 |