Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6817084 | Method for manufacturing a speaker apparatus | Yasuhisa Abe, Fumio Murayama | 2004-11-16 |
| 6665414 | Speaker system and cooling device therefor | Fumio Murayama, Takashi Suzuki | 2003-12-16 |
| 6604271 | Process for processing a conductive damper for use in speaker | Toshihiro Ishigaki | 2003-08-12 |
| 6343136 | Speaker apparatus and manufacturing method thereof | Yasuhisa Abe, Fumio Murayama | 2002-01-29 |