Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D310081 | Headphone | Takefumi Daido | 1990-08-21 |
| D306834 | Digital position readout system | Hisanori Narita | 1990-03-27 |
| 4445150 | Recording in a single track visual signals associated with audio signals recorded in opposed directions in plural tracks | Heitaro Nakajima, Kenkichi Umeda, Youichi Kodera, Noriaki Naito, Hiroyuki Yamauchi +4 more | 1984-04-24 |