About 95 results
https://drivepatents.com/patents/1105690 · 27 Mar 2002
Locking system comprises a first on-board locking unit and a second unit carried by the user. The first unit sends a wake signal to the second unit, which changes from sleep state to active condition. The first unit sends a third signal to the second unit ...
https://drivepatents.com/patents/1106297 · 6 Mar 2002
A stationary device 20 sends a portable-device finding signal to a portable device 10 from a plurality of stationary-device side antennae 24 and 25, which are located at different positions. Upon receipt of the portable-device finding signal from the stati...
https://drivepatents.com/patents/1108417 · 21 Nov 2001
Radio collision between radio based security systems on two vehicles (V1,V2) may be overcome by making identification system (M1) emit shortened codes after an initial failure to authenticate a response. The shortened code is sufficient to establish the pr...
https://drivepatents.com/patents/1108998 · 24 Oct 2001
In a remote control (300) for defining the release request of a device (301) a carrier signal (T) available with a periodically changed frequency is modulated with a binary data signal and transferred from the remote control to the device. A received signa...
https://drivepatents.com/patents/1109572 · 10 Oct 2001
An on-vehicle apparatus communicates with an electronic key by wireless communication. The one-vehicle apparatus decides to unlock a vehicular door according to an identification result between first ID of the electronic key and unlock-operation ID of the ...
https://drivepatents.com/patents/1109431 · 10 Oct 2001
The present invention is directed to a method for controlling access based on a radio frequency signal, the method including receiving a signal from a source and analyzing the received signal. The proximity of the source of the signal is determined, in whi...
https://drivepatents.com/patents/1110102 · 19 Sep 2001
A security system to enable access to a protected area, comprising a remote control unit (22) with a transponder (28), carried by an individual, which transmits an identification code on reception of an interrogation signal. A control unit, located within ...
https://drivepatents.com/patents/1111961 · 27 Jun 2001
The central locking activating and de-activating device has a portable transmitter for providing a coded information received by an onboard receiver for comparison with a stored coded information, to provide a control signal for activating/de-activating th...
https://drivepatents.com/patents/1112219 · 20 Jun 2001
The device has a portable transmitter for wirelessly sending coded information to a receiver for comparison with defined coded information. The receiver outputs a drive signal to the security device if the information agrees. After mechanical activation of...
https://drivepatents.com/patents/1112205 · 20 Jun 2001
The device has a portable transmitter unit for sending coded information wirelessly and a receiver that compares received and predetermined coded information and outputs a drive signal to the security device if they agree. The transmitter and receiver are ...