Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6081192 | Fire alarm system | Kaoru Takahashi, Keiichi Takahashi, Kouichi Hishino | 2000-06-27 |
| 5790018 | Fire alarm system | Kaoru Takahashi, Keiichi Takahashi, Kouichi Hishino | 1998-08-04 |
| 5650762 | Fire alarm system | Kaoru Takahashi | 1997-07-22 |