Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6791453 | Communication protocol for interconnected hazardous condition detectors, and system employing same | John Andres, Michael W. Apperson, Joseph G. DeLuca, Craig Kleinberg, Larry R. Ratzlaff +2 more | 2004-09-14 |
| 6753786 | Microprocessor-based combination smoke and carbon monoxide detector having intelligent hush feature | Michael W. Apperson, John Andres, Joseph G. DeLuca, Larry R. Ratzlaff | 2004-06-22 |