Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8150278 | Image forming apparatus including a sound sensor to determine cleaning failure | Osamu Satoh, Yasushi Nakazato, Kohji Ue, Masahide Yamashita, Jun Yamane | 2012-04-03 |
| 7787635 | Dip filter frequency characteristic decision method | Daisuke Higashihara, Koichi Tsuchiya, Tomohiko Endo | 2010-08-31 |
| 7260227 | Method and device for measuring sound wave propagation time between loudspeaker and microphone | Daisuke Higashihara, Koichi Tsuchiya, Tomohiko Endo | 2007-08-21 |