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:
Apr. 01, 2003
Filed:
Apr. 24, 2001
James G. Eagleson, San Jose, CA (US);
Arthur E. Anderson, III, Sunnyvale, CA (US);
Timothy K. Brand, Cupertino, CA (US);
Nikola Cargonja, San Carlos, CA (US);
Ravindra U. Rajapakse, San Francisco, CA (US);
Savi Technology, Inc., Sunnyvale, CA (US);
Abstract
An apparatus ( ) includes a signpost ( ) which transmits relatively low frequency signpost signals that are fundamentally magnetic in character, a beacon tag ( ) which receives the signpost signals and transmits radio frequency signals containing a signpost code ( ) from a received signpost signal, and a reader ( ) which receives the radio frequency signals. One of the signpost and tag is stationarily supported, and the other is mounted on a moveable item. Based on the signals received by the reader, the location of the item can determined with a high degree of accuracy.