Bayerische Motoren Werke Aktiengesellschaft

Ruediger Bartz

Carsten Befelein

A mobile transponder for vehicles with an optical indicator providing information concerning the direction from the transponder to a vehicle. A plurality of antennas provide three-dimensional directional characteristics in order to recognize the signal from the vehicle and to provide a directed output. An evaluation circuit analyzes the signal from the antenna and provides output information concerning the direction and location of the vehicle in relationship to the transponder. This information is displayed on the transponder regardless of the orientation of the transponder.

Mobile transponder for a motor vehicle

In a method for authenticating a spare key for use with a vehicle in the absence of the regular key, the spare key is provided with an identification number that is transmitted to, and checked by, a central station. The spare key is authenticated by an authorization signal sent from the central station to the vehicle.

Method for authenticating a spare key for using a vehicle

In the case of a vehicle user identification device having a mobile transponder which contains a memory for an authorization code and a transmitting-receiving device for transmitting the authorization code to a vehicle-fixed receiver, the transponder is arranged in a user's mobile information and communication device.

Vehicle user identification device

In an identification system for the user of a vehicle having a mobile transponder which contains a memory for an authorization code and a transmitting-receiving device for transmitting the authorization code to a vehicle-fixed receiver, the transponder is arranged in a user's wristwatch.

Growing community of inventors

Munich, Germany

Ruediger Bartz