About 95 results
https://drivepatents.com/patents/1096567 · 23 Apr 2003
The system has an access control part (4) and an authentication element (2) which includes a communication channel (6) for exchanging a signal (2) that is modulated based on frequency shift keying. At least two receivers (8a,8b) separately receive the two ...
https://drivepatents.com/patents/1098492 · 5 Feb 2003
The opening code transmission method has an identification entered via a mobile radio network terminal (24) and received by a server (30), for authentication before transmission of an opening code back to the mobile radio network terminal, at which it is d...
https://drivepatents.com/patents/1098885 · 22 Jan 2003
The transmitter and receiver, which operate e.g. via radio waves have respective clocks that are synchronized with each other. Time information is derived from the current transmitter clock time, and is added to the data message to be transmitted. The rece...
https://drivepatents.com/patents/1099337 · 2 Jan 2003
A car hands-free unit (HFU 140) with a Low-Power RadioFrequency (LPRF) module 141 (typically a Bluetooth module) configured to receive an identifier 134 from a car key 133. Different drivers are provided with different car keys 133. When receiving the iden...
https://drivepatents.com/patents/1099315 · 2 Jan 2003
In a passive entry comprising a car-mounted transmitter-receiver and one or more portable transmitter receivers, the car-mounted transmitter-receiver generates a request signal, when any of the portable transmitter-receivers receives the request signal, an...
https://drivepatents.com/patents/1099308 · 2 Jan 2003
Modulated radio signals are transmitted between transceivers (T1,T2) of a vehicle base unit and mobile ID transmitter of passive entry systems. The carrier frequency of the radio signals is temporally varied, preferably within band limits, and synchronized...
https://drivepatents.com/patents/1100560 · 6 Nov 2002
A scanning device (12) for use in periodically scanning for the existence of at least one corresponding remote response device (22) wherein, in use, the rate at which the scanning device scans for the response device decreases as the time since the detecti...
https://drivepatents.com/patents/1101302 · 2 Oct 2002
System comprises a portable key or signaler that exchanges signals with an onboard transceiver. The interrogation signal (F) from the onboard unit and the response signal (A) are both divided into sections (Fi, Ai) with a section of the response signal onl...
https://drivepatents.com/patents/1102645 · 7 Aug 2002
The method for unlocking or locking a car door or starting its engine comprises automatic transmission of a signal from a transmitter (6) in the car. The echo from an authorisation article (3) , e.g. a smart card, carried by the owner is detected and the o...
https://drivepatents.com/patents/1103114 · 17 Jul 2002
A theft prevention device (10), having a first switch (18) capable of movement between a first position and a second position, the first position electrically connecting an electrical system (28) to a power supply (12) of a vehicle and the device includes ...