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. 24, 2009
Filed:
May. 25, 2006
Stefan Albrecht, Mauchenheim, DE;
Roland Fischer, Nidderau, DE;
Peter Herges, Stuttgart, DE;
Joerg Huber, Durmersheim, DE;
Roland Roessler, Leonberg, DE;
David J. Skiff, Rochester, MI (US);
John A. Wilke, Oxford, MI (US);
Stefan Albrecht, Mauchenheim, DE;
Roland Fischer, Nidderau, DE;
Peter Herges, Stuttgart, DE;
Joerg Huber, Durmersheim, DE;
Roland Roessler, Leonberg, DE;
David J. Skiff, Rochester, MI (US);
John A. Wilke, Oxford, MI (US);
Daimler AG, Stuggart, DE;
Abstract
The invention relates to an apparatus for finding a parked vehicle again. According to the invention, a portable unit is provided with a pressure sensor whose signals can be evaluated by an evaluation and control unit in order to determine the current air pressure, with the evaluation and control unit evaluating the determined air pressure in order to determine altitude, and storing a first air pressure value as a reference value at a predeterminable first time, which reference value represents an instantaneous altitude of a geographic position of the parked vehicle, with the evaluation and control unit estimating a height difference between a current geographic position of the portable unit and the geographic position of the parked vehicle at a second time, and/or continuously from a pressure difference between the determined current air pressure value and the reference value.