Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6812855 | Road traffic weather observation system and self-emission road sign system | Youichirou Hishigaki, Shigeki Kondou, Motonori Ogata, Ryuji Imazu, Masaya Yuasa | 2004-11-02 |