Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8644527 | Piezoelectric acoustic transducer | Akiko Fujise, Toshiyuki Matsumura | 2014-02-04 |
| 7831413 | Sound field measuring method and sound field measuring device | Toshihiko Date, Hiroyuki Kano | 2010-11-09 |
| 7680286 | Sound field measurement device | Hiroyuki Hashimoto, Kenichi Terai, Koichi Hashimoto | 2010-03-16 |
| 7181029 | Speaker system for picture receiver and speaker installing method | Kazuhiko Ikeuchi, Yuichi Matsuoka | 2007-02-20 |
| 6747395 | Piezoelectric loudspeaker | Hiroyuki Takewa, Mikio Iwasa, Mitsukazu Kuze | 2004-06-08 |
| 6655495 | Loudspeaker damper and loudspeaker | Mitsukazu Kuze, Hiroyuki Takewa, Mikio Iwasa | 2003-12-02 |
| 6069965 | Loudspeaker | Hiroyuki Takewa, Mikio Iwasa, Tohru Kikkawa | 2000-05-30 |
| 5862242 | Speaker | Hiroyuki Takewa, Akihiro Furuta, Mikio Iwasa, Kuniaki Sakai | 1999-01-19 |
| 5664024 | Loudspeaker | Akihiro Furuta, Hiroyuki Takewa, Mikio Iwasa, Shinya Mizone, Kuniaki Sakai | 1997-09-02 |
| 5430260 | Speaker system | Satoshi Koura, Shuji Saiki | 1995-07-04 |
| 5150418 | Speaker system | Kazuki Honda, Hiroyuki Takewa, Shuji Saiki | 1992-09-22 |