Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9743192 | Speaker and vibration control unit | Kiyosei Shibata, Toshihiro Kido, Hirofumi Tetsu | 2017-08-22 |
| D736743 | Loudspeaker with amplifier | Kiyosei Shibata, Katsuhiko Taira | 2015-08-18 |
| 7499556 | Integrating apparatus | — | 2009-03-03 |
| 7218740 | Audio system | — | 2007-05-15 |
| 7130441 | Speaker system having processing circuitry | Katsuhiko Tsumori, Akira Nishikawa, Hiroyuki Yoshii | 2006-10-31 |
| 7110550 | Sound system | Akira Motojima, Yuji Tomita, Hideki Matsui | 2006-09-19 |
| 7082208 | Speaker assembly having plural drivers | Katsuhiko Tsumori, Akira Nishikawa, Hiroyuki Yoshii | 2006-07-25 |
| D514088 | Loudspeaker | Katsuhiko Taira, Yoshihito Takeuchi | 2006-01-31 |
| 6990206 | Integrating apparatus | — | 2006-01-24 |
| 6751330 | Speaker system | Akira Nishikawa, Katsuhiko Tsumori, Hiroyuki Yoshii | 2004-06-15 |
| 6724909 | Speaker apparatus | Katsuhiko Tsumori, Akira Nishikawa, Hiroyuki Yoshii | 2004-04-20 |
| 6678384 | Speaker structure | Hiroyuki Yoshii | 2004-01-13 |
| 5710818 | Apparatus for expanding and controlling sound fields | Toshitaka Yamato, Kazuya Sako, Hiroyuki Yamaguchi | 1998-01-20 |
| 5297209 | System for calibrating sound field | — | 1994-03-22 |
| 5247474 | Coefficients setting method of a reverberation unit | — | 1993-09-21 |