Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7394913 | Speakers | Kyoichi Matsuda, Hiroyuki Kobayashi | 2008-07-01 |
| 6782114 | Loudspeaker | Takashi Suzuki | 2004-08-24 |
| 6751324 | Speaker device | Shigeru Watanabe | 2004-06-15 |
| 5225639 | Loudspeaker | Hiroyuki Kobayashi, Takeshi Tokusyo | 1993-07-06 |
| 5008945 | Water-proof speaker unit | Fumio Murayama | 1991-04-16 |
| 4953220 | Mobile speaker system having an illumination effect | Fumio Murayama, Chuichi Endo | 1990-08-28 |
| 4847907 | Speaker system for radiating acoustic energy into a cabin of a motor vehicle | — | 1989-07-11 |
| 4553630 | Speaker with tweeter angle adjusting device | — | 1985-11-19 |