Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6674402 | Global positioning system and global positioning apparatus | Seiichiro Hirata | 2004-01-06 |
| 6483457 | Global positioning system and global positioning apparatus | Seiichiro Hirata | 2002-11-19 |
| 6329946 | GPS position measuring system and GPS position measuring apparatus | Seiichiro Hirata | 2001-12-11 |