Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6457381 | Reversing device for vehicle | Yukimi Ase, Yoji Kanaoka, Koichi Shimamura, Yoshifumi Mochizuki | 2002-10-01 |
| 6298943 | Bass-reflex speaker assembly | Katsuhisa Yamada, Yoji Kanaoka, Koichi Shimamura | 2001-10-09 |