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:
May. 30, 2006
Filed:
Nov. 07, 2002
Robert Fischer, Kelheim, DE;
Claus Peter, Regensberg, DE;
Robert Fischer, Kelheim, DE;
Claus Peter, Regensberg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
An antitheft device for a motor vehicle has a first receiver () in the motor vehicle, which is designed to receive signals in narrowband. The signals received by this receiver are evaluated in accordance with the code information contained in them. Furthermore, the antitheft device has a second broadband receiver () which receives signals outside the useful frequency band (). If signals are received whose signal strength is above a threshold value (S), whose signal duration is shorter than a predefined time period (t–t) or whose code information corresponds largely to anticipated code information, the access to the motor vehicle, and its use, are not enabled.