|
| US4015074 | 9 févr. 1976 | 29 mars 1977 | Hochiki Corporation | Voluntary information transmitting apparatus in a wired television system |
| US4105974 | 14 oct. 1975 | 8 août 1978 | | Priority interrupt circuit |
| US4225821 | 28 nov. 1977 | 30 sept. 1980 | | Electronic signalling device to alert CB radio equipped vehicles |
| US4403208 | 13 avr. 1979 | 6 sept. 1983 | | Warning-signal-producing system for a motor vehicle responsive to a vehicle-presence-indicating radio wave signal emitted by another vehicle and indicative of its presence |
| US4673832 | 13 mars 1986 | 16 juin 1987 | Aisin Seiki Kabushiki Kaisha | Safety device for electronic equipments |
| US4748685 | 10 oct. 1986 | 31 mai 1988 | Motorola, Inc. | Mobile radio communications system |
| US5635925 | 9 févr. 1996 | 3 juin 1997 | Toyota Jidosha K.K. Aisin AW Co., Ltd. | Volume control of aural guidance of vehicle route guidance apparatus |
| US5749050 | 7 oct. 1996 | 5 mai 1998 | | Automatic emergency alarm reception apparatus using specific frequency |
| US6204761 | 13 nov. 1998 | 20 mars 2001 | | Weather alert system |
| US6462665 | 16 mai 2000 | 8 oct. 2002 | Wheelock, Inc. | Method and apparatus for sending a weather condition alert |