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:
May. 31, 2005
Filed:
Sep. 30, 2002
Michael R. Andrews, Berkeley Heights, NJ (US);
Tin Kam Ho, Cedar Grove, NJ (US);
Gregory P. Kochanski, Dunellen, NJ (US);
Louis J. Lanzerotti, Morristown, NJ (US);
David J. Thomson, Kingston, CA;
Michael R. Andrews, Berkeley Heights, NJ (US);
Tin Kam Ho, Cedar Grove, NJ (US);
Gregory P. Kochanski, Dunellen, NJ (US);
Louis J. Lanzerotti, Morristown, NJ (US);
David J. Thomson, Kingston, CA;
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
Systems and techniques for location determination. A plurality of tags emitting radio frequency signals are dispersed throughout a region, such as a building, within which a user's location is to be determined. The radio frequency signals emitted by the tags include information that can be used to identify the location in which the tags axe placed, or simply to distinguish the tags from one another. A portable device receives signals from the tags and provides the signal information to a location server that computes the location of the portable device by comparing the signal information received from the portable device to a map of location venus stored signal information, and identifies the location of the portable device as the location for which the stored signal information best matches the signal information received from the portable device.