Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9743192 | Speaker and vibration control unit | Hiroshi Kowaki, Toshihiro Kido, Hirofumi Tetsu | 2017-08-22 |
| D736743 | Loudspeaker with amplifier | Hiroshi Kowaki, Katsuhiko Taira | 2015-08-18 |
| 8559666 | Speaker device | — | 2013-10-15 |
| 8509471 | Speaker device | — | 2013-08-13 |
| 8223987 | Attachment structure for a sound generating apparatus | Kiyoshi Ootani, Munekazu Yanagida, Yuichi Nakajima, Naoki Fujikawa, Koichi Toyama | 2012-07-17 |
| 8045736 | Sound field reproduction system | Masanobu Maeda | 2011-10-25 |
| 7912239 | Flat speaker | Takeshi Nishimura, Masato Sorimachi, Yuuzo Nakajima, Hiroshi Ikeda, Kiyoshi Ootani +2 more | 2011-03-22 |