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:
Dec. 11, 2001
Filed:
Aug. 09, 1999
Applicant:
Inventors:
Michael Siedentop, Neutraubling, DE;
Ulrich Schrey, Laaber Ot Waldetzenberg, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60Q 2/510 ;
U.S. Cl.
CPC ...
B60Q 2/510 ;
Abstract
A code signal generator has a transponder unit, which proves its authorization for releasing an immobilizer by means of a question-response dialog. The code signal generator has a remote control unit which transmits control signals for unlocking doors upon the actuation of a pushbutton. Both the transponder unit and the remote control unit have a single encryption unit, which is accessed by both units in order to encrypt the signals to be transmitted.