Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6817084 | Method for manufacturing a speaker apparatus | Takeshi Tokusho, Yasuhisa Abe | 2004-11-16 |
| 6665414 | Speaker system and cooling device therefor | Takashi Suzuki, Takeshi Tokusho | 2003-12-16 |
| 6343136 | Speaker apparatus and manufacturing method thereof | Takeshi Tokusho, Yasuhisa Abe | 2002-01-29 |
| 6030561 | Methods for making a loudspeaker vibrating diaphragm | Masatoshi Sato, Kunio Mitobe, Jiro Nakazono | 2000-02-29 |
| 5822444 | Loudspeaker | Hiroya Oizumi | 1998-10-13 |
| 5793002 | Loudspeaker vibrating diaphragm and methods for its production | Masatoshi Sato, Kunio Mitobe, Jiro Nakazono | 1998-08-11 |
| 5297212 | Loudspeaker system installed on an automobile door and including a woofer and a tweeter | Takashi Suzuki | 1994-03-22 |
| 5008945 | Water-proof speaker unit | Tomiaki Ando | 1991-04-16 |
| 4965837 | Environmentally resistant loudspeaker | Yoshiaki Homma | 1990-10-23 |
| 4953220 | Mobile speaker system having an illumination effect | Tomiaki Ando, Chuichi Endo | 1990-08-28 |
| 4924965 | Speaker system | Takashi Suzuki | 1990-05-15 |
| 4837835 | Speaker system for motor vehicles with an alarm device | — | 1989-06-06 |
| 4821331 | Coaxial speaker unit | Mitsuyoshi Matsuda | 1989-04-11 |
| 4451928 | Multi-speaker system for use in automobiles | — | 1984-05-29 |