Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5311024 | Lens arrangement for intrusion detection device | Douglas H. Marman | 1994-05-10 |
| RE33807 | Self-powered sensor for use in closed-loop security system | Douglas H. Marman | 1992-01-28 |
| 4837558 | Glass break detector | Douglas H. Marman | 1989-06-06 |
| 4745398 | Self-powered sensor for use in closed-loop security system | Douglas H. Marman | 1988-05-17 |
| 4692752 | Moisture detector | — | 1987-09-08 |
| 4661804 | Supervised wireless security system | — | 1987-04-28 |
| D281865 | Surface mount housing for a security system transmitter | — | 1985-12-24 |
| D281866 | Housing for a transmitter for a security alarm system | — | 1985-12-24 |
| D280494 | Housing for a personal transmitter for use in an emergency alarm system | — | 1985-09-10 |
| 4523184 | Supervised wireless security system | — | 1985-06-11 |
| 4513354 | Housing for an electronic circuit board | — | 1985-04-23 |