|
| US4176346 | 21 nov 1977 | 27 nov 1979 | John O. Stapleton | Smoke alarm network |
| US4319231 | 27 aug 1979 | 9 mar 1982 | Hochiki Corporation | Fire sensing system protected from noise factors |
| US7456750 | 19 apr 2001 | 25 nov 2008 | Federal Express Corporation | Fire suppression and indicator system and fire detection device |
| US7806195 | 7 nov 2008 | 5 okt 2010 | Federal Express Corporation | Fire sensor, fire detection system, fire suppression system, and combinations thereof |
| US7810577 | 30 aug 2005 | 12 okt 2010 | Federal Express Corporation | Fire sensor, fire detection system, fire suppression system, and combinations thereof |
| US7876230 | 7 nov 2008 | 25 jan 2011 | Federal Express Corporation | Fire supression and indicator system and fire detection device |