Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11395067 | Microphone-loudspeaker integrated apparatus and vehicle | Keizoh Kawaguchi, Ichiro Shigetomi | 2022-07-19 |
| 11375304 | Sound output device | Akiyoshi Sato, Tsuyoshi Okami | 2022-06-28 |
| 10958998 | Sound output device | Akiyoshi Sato, Tsuyoshi Okami | 2021-03-23 |
| 10820076 | Sound output device | Akiyoshi Sato, Tsuyoshi Okami | 2020-10-27 |
| 9535102 | Test signal supplying device and semiconductor integrated circuit | Akihiko Toda, Tatsuya Kishii | 2017-01-03 |
| 6826215 | Laser diode driving circuit | Nobuaki Tsuji | 2004-11-30 |
| 6509856 | Digital-to-analog converter | Masao Noro, Shoji Yasui | 2003-01-21 |