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:
Feb. 12, 2002
Filed:
Mar. 03, 2000
Andreas Pohlman, Weil der Stadt, DE;
Matthias Reinhardt, Winnenden, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
An electronic apparatus for determining the distance between two objects has an interrogation signal generator for generating and transmitting an interrogation signal, and a response signal receiver. An evaluation unit is situated in one object, and interrogation signal reception means and response signal generation means in the other object. According to the invention, the evaluation unit is set up for determining a distance-indicative phase difference between the interrogation signal and the response signal. An electronic security system, such as a vehicle locking system of the keyless-go type, having a distance measurement of this type is also included.