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:
Jul. 13, 2010
Filed:
Feb. 11, 2008
David S. Wisherd, Carmel, CA (US);
Robert W. Boyd, Eidson, TN (US);
Tom Richardson, White Pine, TN (US);
Santiago Romero, Mount Airy, MD (US);
Michael A. Wohl, Rogersville, TN (US);
David S. Wisherd, Carmel, CA (US);
Robert W. Boyd, Eidson, TN (US);
Tom Richardson, White Pine, TN (US);
Santiago Romero, Mount Airy, MD (US);
Michael A. Wohl, Rogersville, TN (US);
Wherenet Corp., Santa Clara, CA (US);
Abstract
A location system for tracking assets within a terminal includes a Differential Global Positioning System (DGPS) reference receiver within the terminal that receives GPS signals and generates DGPS correction data. In one aspect, a roving receiver unit is carried by an asset to be tracked within the terminal. It includes a GPS receiver that receives GPS signals and the DGPS correction data from the DGPS reference receiver. A tag transmitter transmits a wireless RF signal containing GPS location data based on received GPS signals and DGPS correction data. At least one access point is positioned within the terminal for receiving the wireless RF signal from the tag transmitter. A processor is operatively connected to the at least one access point for receiving GPS location data and determining a location of the asset to be tracked.