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:
Jun. 03, 2014
Filed:
Oct. 10, 2011
Altan Ameti, Germantown, MD (US);
Keming Chen, Herndon, VA (US);
Robert J Fontana, Potomac, MD (US);
Edward a Richley, Gaithersburg, MD (US);
Belinda Turner, Germantown, MD (US);
Altan Ameti, Germantown, MD (US);
Keming Chen, Herndon, VA (US);
Robert J Fontana, Potomac, MD (US);
Edward A Richley, Gaithersburg, MD (US);
Belinda Turner, Germantown, MD (US);
ZIH Corp., Lincolnshire, IL (US);
Abstract
Various methods and apparatuses that utilize a wireless time reference system are provided herein. One example method involves calibrating independent, spatially-located clocks of a geoposition system in order to geolocate an object having an associated object tag. The example method may include transmitting an RF pulse pair, receiving the pulse pair at multiple locations, utilizing respective frequencies of first and second spatially-located clocks to produce count values to effect measurement of an interarrival interval at each of multiple locations, determining a ratio of count values relative to said first and second spatially-located clocks, and utilizing said ratio to calibrate time indications of said clocks. Other related methods and apparatus are also provided.