The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2001
Filed:
Mar. 27, 2000
Reinhold Berberich, Frankfurt, DE;
Christopher Sievers, Hanau, DE;
Thorsten Bürger, Schwalbach, DE;
Gregor Hassler, Bad Camberg, DE;
Mannesmann VDO AG, Frankfurt, DE;
Abstract
In an apparatus and a method for enabling and/or activating/deactivating a security device, in particular an access device for a motor vehicle, in which, after receiving a stimulation sequence which is transmitted by a transmitter of a transmission device, coded information (enable signal) is transmitted by a portable transmission unit (radio key) and is received by a receiver in the transmission device, a controller comparing the received enable signal with predetermined coded information and, if they match, emitting an actuation signal to the security device, if a plurality of matching radio keys are present in the reception area of the device, the transmission quality between the security device and the radio keys is checked. The only radio key which is used to transmit an enable signal is that which has the best transmission conditions to the security device.