Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7884731 | Photoelectric smoke sensor and lighting equipment | — | 2011-02-08 |
| 7119887 | Optical distance measuring sensor and self-propelled cleaner | Akifumi Yamaguchi, Shinya Kawanishi, Atsuo Fujikawa | 2006-10-10 |