Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4673920 | Fire alarm control and emergency communication system | Kar-Kui Lee, William B. Oliver, Fat-Cho Kwong, Ronald P. Young, Jim Hammell +2 more | 1987-06-16 |
| 4437088 | Electrical simulation of percussive bell | — | 1984-03-13 |
| 4401975 | Electrical synthesis of mechanical bell | Michael Slack | 1983-08-30 |