Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7449990 | 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 | 2008-11-11 |
| 6873254 | Multicondition detection apparatus and method providing interleaved tone and verbal warnings | John Andres, Micahel W. Apperson, Stephen M. Ernst, Richard Kwor, Joseph G. DeLuca | 2005-03-29 |
| 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 |
| 6522248 | Multicondition detection apparatus and method providing interleaved tone and verbal warnings | John Andres, Micahel W. Apperson, Stephen M. Ernst, Richard Kwor, Joseph G. DeLuca | 2003-02-18 |