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. 07, 2012
Filed:
Mar. 30, 2007
Timothy K. Brand, Cupertino, CA (US);
Stephen Earl Hilliker, San Jose, CA (US);
Joseph Siufai Chan, Los Gatos, CA (US);
Albert Nardelli, Mountain View, CA (US);
Nikola Cargonja, San Carlos, CA (US);
Bruno Skracic, San Jose, CA (US);
Don Ahn, Sunnyvale, CA (US);
Timothy K. Brand, Cupertino, CA (US);
Stephen Earl Hilliker, San Jose, CA (US);
Joseph Siufai Chan, Los Gatos, CA (US);
Albert Nardelli, Mountain View, CA (US);
Nikola Cargonja, San Carlos, CA (US);
Bruno Skracic, San Jose, CA (US);
Don Ahn, Sunnyvale, CA (US);
Savi Technology, Inc., Mountain View, CA (US);
Abstract
Systems and methods provide for determining a distance between a signpost and a tag and for locating a tag using multiple signposts. The system uses a signal received at a tag from a signpost, and from them measures the signal strength of the signal with respect to one or more antennas on the tag. The system calculates an RSSI using the measured signal strength, from which a distance can be determined between the signpost and the tag. The system also uses signals received from multiple signposts, to measure multiple signal strengths, resulting in multiple distance determinations corresponding to the various signposts, thereby establishing a location for the tag.