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:
Sep. 20, 2005
Filed:
Nov. 30, 2000
Patric Heide, Neubiberg, DE;
Johannes Ilg, Regensburg, DE;
Richard Roskosch, Ottobrun, DE;
Klause Hofbeck, Neumarkt, DE;
Wolfgang Piesch, Regenstauf, DE;
Martin Vossiek, Munich, DE;
Patric Heide, Neubiberg, DE;
Johannes Ilg, Regensburg, DE;
Richard Roskosch, Ottobrun, DE;
Klause Hofbeck, Neumarkt, DE;
Wolfgang Piesch, Regenstauf, DE;
Martin Vossiek, Munich, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
Anti-theft protection system for a motor vehicle, and a method for operating an anti-theft protection system. The anti-theft protection system has a transmitting and receiving unit in the motor vehicle, which transmits radar signals modulated over a broad bandwidth and then waits for echo signals. A code transmitter, which receives a radar signal, for its part sends back an additionally modulated and coded signal. An evaluation unit analyses all the received echo signals firstly for authorization of the code transmitter and secondly in order to determine the distance between the code transmitter and the transmitting and receiving unit.