Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5966453 | Speaker system for use in an automobile vehicle | Shinji Koyano, Teruo Baba, Junko Yamamoto | 1999-10-12 |
| 5953432 | Line source speaker system | Hirofumi Yanagawa | 1999-09-14 |