Issued Patents All Time
Showing 51–58 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5115399 | Position input system for vehicular navigation apparatus | Shoji Yokoyama, Takashi Yamada, Koji Sumiya, Shuzo Moroto | 1992-05-19 |
| 5067082 | Navigation apparatus | Akimasa Nanba, Shoji Yokoyama | 1991-11-19 |
| 4992947 | Vehicular navigation apparatus with help function | Shoji Yokoyama, Koji Sumiya, Shuzo Moroto | 1991-02-12 |
| 4943925 | Navigation apparatus based on present position calculating system | Shuzo Moroto, Koji Sumiya, Shouji Yokoyama, Akimasa Nanba | 1990-07-24 |
| 4939662 | Navigation apparatus | Shoji Yokoyama | 1990-07-03 |
| 4937751 | Navigation apparatus | Shoji Yokoyama | 1990-06-26 |
| 4937752 | An apparatus for correcting distance error in a navigation system | Akimasa Nanba, Shoji Yokoyama | 1990-06-26 |
| 4882696 | Navigation apparatus | Shoji Yokoyama | 1989-11-21 |