Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5986556 | Fire detector | Eiji Hirooka, Makoto Yasukawa | 1999-11-16 |
| 5872517 | Fire detector | Eiji Hirooka, Makoto Yasukawa | 1999-02-16 |
| 5670948 | Fire detector | Eiji Hirooka, Makoto Yasukawa | 1997-09-23 |
| 5598147 | Smoke detecting apparatus for fire alarm | Hideo Ito, Ryousaku Kobayashi | 1997-01-28 |
| 5574435 | Photoelectric type fire detector | — | 1996-11-12 |
| 5473314 | High sensitivity smoke detecting apparatus using a plurality of sample gases for calibration | Hideo Ito, Ryousaku Kobayashi, Tadao Morita | 1995-12-05 |
| 5448224 | Heat detector including device for detecting abnormality of external temperature sensor | — | 1995-09-05 |
| 5400013 | Ionization type smoke detector | — | 1995-03-21 |
| 5381131 | Smoke detecting apparatus for fire alarm | Hideo Ito, Ryousaku Kobayashi | 1995-01-10 |
| 4864455 | Arrester disconnecting device | Tetsuro Shimomura, Katsufusa Tanaka | 1989-09-05 |
| 4758733 | A labyrinthine light scattering-type smoke detector | — | 1988-07-19 |
| 4754150 | Photoelectric smoke detector | Yoshiharu Orioka | 1988-06-28 |
| 4204239 | Abnormal voltage protection device | Mitsumasa Imataki, Yoshikazu Shibuya | 1980-05-20 |