Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884222 | Fire alarm system | Tetsuya Nagashima, Eiji Matsushita, Sadataka Yuchi | 1989-11-28 |
| 4819733 | Automatic fire extinguishing equipment | Yoshio Aria, Kouji Akiba | 1989-04-11 |
| 4800285 | Flame detecting arrangement for detecting a flame through horizontal and vertical scanning of a supervisory region by using a photodetector | Kouji Akiba, Yoshio Arai | 1989-01-24 |
| 4796018 | Exit guiding system | Tsutomu Nakanishi, Yoshiaki Fuwa, Yasaburo Adachi | 1989-01-03 |