Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4973943 | Signal control system using two synchronous ring counter circuits | — | 1990-11-27 |
| 4300132 | Fire alarm system | Akira Furuyama | 1981-11-10 |
| 4246635 | Power-supply device which boosts and stabilizes the voltage | — | 1981-01-20 |
| 4223305 | Single station type ionization smoke sensor | — | 1980-09-16 |
| D256897 | Smoke detector | Yoshinori Kaminaka, Kazumi Kikuchi | 1980-09-16 |