Référencé par|
| US4163220 | 15 avr. 1977 | 31 juil. 1979 | Firetrol, Inc. | Distress signalling device | | US4491971 | 8 mars 1983 | 1 janv. 1985 | The United States of America as represented by the Secretary of the Interior | Short range trapped miner locator | | US5237491 | 6 nov. 1992 | 17 août 1993 | | Personal rescue light | | US5262768 | 3 oct. 1991 | 16 nov. 1993 | | Rescue beacon apparatus | | US5367296 | 18 févr. 1993 | 22 nov. 1994 | | Communication signal device | | USD579811 | 31 mars 2008 | 4 nov. 2008 | | Emergency alert signal |
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