3,273,146 A 9/1966 Hurwitz, Jr.... 343/6.8 tance of a tag from an antenna is calculated by
measuring the 3.289, 114 A 11/1966 Rowen........................ 333/30 round trip signal time. The …

3,707,711 12/1972 Cole et al.. System for tracking mobile tags. Cell controllers With mul
3,740,742 6/1973 Thompson et al.. tiple antenna modules generate a carrier signal Which is …

A system and method are useful for tracking tWo or more Related US, Application Data
objects moving by separate transport paths to a destination (60) Provisional application NO …

Jul. 7, 2003. now abandoned, which is a continuation removal of objects from a location and
the replacement of of application No. 10/122 507 filed on Apr. 15, 2002 the objects at the …

The present invention is related to wireless tracking systems and methods. More specifically,
the present inven tion relates to a system and method for determining if a tracking tag has …

The present invention is related to wireless tracking sys tems and methods. More
specifically, the present invention relates to a system and method for determining a real-time …

(57) ABSTRACT A System and method are useful for tracking an article at a plurality of
Stations. A Smart tag is associated with each article to be tracked, eg, by being attached to …

The present invention relates to systems which provide location tracking and monitoring of a
portable tracking device or “tag” that is affixed to an individual or other object, and in which …

[57] ABSTRACT A system and method to monitor the speci? c location of a person, pet or
item of personal property by employing elements that enable the user to pinpoint both the …

The invention relates to a method and apparatus for tracing a path traversed by an entity or
object, for example an article, eg a container shipment, asset or person, such as a person …