Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4937562 | Moisture-proof ionization smoke detector | Hiroshi Yashima | 1990-06-26 |
| 4914425 | Highly sensitive smoke detector | Hiroshi Yashima, Satoru Koizumi, Tetsuya Nagashima, Yoshihito Hirai, Tetsuji Sato | 1990-04-03 |
| D256897 | Smoke detector | Takeo Arima, Kazumi Kikuchi | 1980-09-16 |