Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D851633 | Microphone with built-in speaker | Akinori Nakano | 2019-06-18 |
| 7965850 | Resonance frequency determining method, resonance frequency selecting method, and resonance frequency determining apparatus | — | 2011-06-21 |
| 7787635 | Dip filter frequency characteristic decision method | Shokichiro Hino, Koichi Tsuchiya, Tomohiko Endo | 2010-08-31 |
| 7596238 | Howling margin measuring device | — | 2009-09-29 |
| 7260227 | Method and device for measuring sound wave propagation time between loudspeaker and microphone | Shokichiro Hino, Koichi Tsuchiya, Tomohiko Endo | 2007-08-21 |
| 7249511 | Method of detecting resonant frequency, method of selecting resonance frequency, and device for detecting resonant frequency sensor | — | 2007-07-31 |