Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5334022 | Auditory playing device | Keiko Kitagawa | 1994-08-02 |
| 5012230 | Input device for digital processor based apparatus | — | 1991-04-30 |
| 4196907 | Record player | Kazuyuki Takizawa, Toshio Sato, Makoto Kodama | 1980-04-08 |