Issued Patents 1982
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4359721 | Two-wire multi-zone alarm system | Roy Harvey | 1982-11-16 |
| 4331952 | Redundant sensor adapter | Kevin Flynn | 1982-05-25 |
| 4321592 | Multiple sensor intrusion detection system | Richard E. Crandall, Sheldon Apsell | 1982-03-23 |
| 4321594 | Passive infrared detector | John K. Guscott | 1982-03-23 |