Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8253578 | Smoke sensor of the sound wave type including a smoke density estimation unit | Yoshifumi Watabe, Yoshiaki Honda, Yuji Takada, Takayuki Nishikawa | 2012-08-28 |
| 5138302 | Photoelectric, scattered light smoke detector | Akira Nagaoka, Shigeki Shimomura, Masao Arakawa, Hironori Kami, Masanobu Ogawa | 1992-08-11 |
| 5025169 | Sensor in IC formation | Masao Arakawa, Masanobu Ogawa, Hironori Kami | 1991-06-18 |