Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7904239 | Travel route display system | Miyuki Ishii, Yoshinori Nakatsuka, Yoshihito Ibe | 2011-03-08 |
| D302430 | Speaker | Hiroshi Matsushima | 1989-07-25 |
| D295857 | Speaker | — | 1988-05-24 |
| 4597469 | Collapsible headphone structure | — | 1986-07-01 |