Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6828936 | Navigation apparatus for mobile vehicle and navigation communication system | Koji Sakuma, Tadamasa Yamanaka | 2004-12-07 |
| 6792262 | Mobile system and mobile management system | Tadamasa Yamanaka, Koji Sakuma | 2004-09-14 |