Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D367622 | Smoke detector cover | — | 1996-03-05 |
| D367623 | Smoke detector cover | — | 1996-03-05 |
| D364108 | Smoke detector cover | — | 1995-11-14 |
| 5148149 | Differential delay intrusion detection sensory system | David Campbell | 1992-09-15 |