Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7564365 | Smoke detector and method of detecting smoke | Douglas H. Marman | 2009-07-21 |
| 7019683 | Shipping container security system | James E. Stevens, Feng-Xiang Tang, Niall Creedon, Douglas H. Marman | 2006-03-28 |
| 5578988 | Intrusion detection system having self-adjusting threshold | Paul Hoseit, Gordon S. Whiting | 1996-11-26 |
| 5499012 | Intrusion detector test circuit which automatically disables a detected-event indicator | Lawrence R. Tracy, Dale Gene Dorando | 1996-03-12 |
| 5491467 | Location independent intrusion detection system | Lawrence R. Tracy, David L. Houston, Walter B. Wallace, Jr., Jeffrey Bamford | 1996-02-13 |
| D354925 | Infra-red intruder detector | David L. Houston | 1995-01-31 |
| 5032969 | Turbine engine igniter exciter circuit | LeRoy B. Adam | 1991-07-16 |
| 4613797 | Flash strobe power supply | Paul D. Graham, Bruce E. Heeb | 1986-09-23 |
| 4530037 | Flash tube with moving reflectors | Leslie J. Jezuit | 1985-07-16 |