Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4673920 | Fire alarm control and emergency communication system | Harry D. Ferguson, Kar-Kui Lee, William B. Oliver, Fat-Cho Kwong, Ronald P. Young +2 more | 1987-06-16 |
| 4529881 | Flame detector with test lamp and adjustable field of view | Thomas Ceurvels, Charles F. Doherty | 1985-07-16 |
| 4253056 | Ground fault detector for DC power supply | — | 1981-02-24 |