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. 20, 2004
Filed:
Apr. 24, 2001
James G. Eagleson, San Jose, CA (US);
Joseph S. Chan, Milpitas, CA (US);
Nikola Cargonja, San Carlos, CA (US);
Savi Technology, Inc., Sunnyvale, CA (US);
Abstract
An apparatus ( ) includes a signpost ( ) which transmits signpost signals ( ) to a tag ( ), which in turn transmits beacon signals ( ) to a reader ( ). One of the signpost and tag is mounted on an item to be tracked. A control system ( ) is responsive to the reader, and can cause the signpost to vary the signpost signal in a manner which varies at least one operational characteristic of the tag, such as a transmission rate, a transmission power, a tag identification code, a password, or an encryption code, or which shifts the tag between a normal operational mode and a low power operational mode in which its transmitter is disabled.