Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6545602 | Fire alarm system | Yasuo Yamaguchi, Makoto Sakihara, Takahiro Oki, Munehiro Onji | 2003-04-08 |
| 6081192 | Fire alarm system | Kaoru Takahashi, Keiichi Takahashi, Yukihiko Usami | 2000-06-27 |
| 5790018 | Fire alarm system | Kaoru Takahashi, Keiichi Takahashi, Yukihiko Usami | 1998-08-04 |
| 5602374 | Fire receiver in fire alarm system | Akio Tsumuji | 1997-02-11 |