Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10271144 | Speaker unit | Kayo Takamatsu | 2019-04-23 |
| 8223987 | Attachment structure for a sound generating apparatus | Kiyosei Shibata, Kiyoshi Ootani, Munekazu Yanagida, Naoki Fujikawa, Koichi Toyama | 2012-07-17 |
| 8090138 | Audio devices for vehicles | Kouichi Toyama, Kiyoshi Ootani, Akira Nishikawa, Noboru Hidaka | 2012-01-03 |
| 7912239 | Flat speaker | Takeshi Nishimura, Masato Sorimachi, Yuuzo Nakajima, Hiroshi Ikeda, Kiyoshi Ootani +2 more | 2011-03-22 |
| 7907742 | Exciter for directly vibrating board and speaker apparatus used the same | Kiyoshi Ootani, Akira Nishikawa, Noboru Hidaka | 2011-03-15 |
| 7030522 | Exciter for directly vibrating board | Kiyoshi Ohtani, Akira Nishikawa, Noboru Hidaka | 2006-04-18 |
| 6331133 | Automatic drill bit re-pointing apparatus and method | Ichiro Katayama, Yoshinobu Watanabe, Yoshiharu Shinbo | 2001-12-18 |