Patent ID: 6837427

Claim:
An RF system for remotely monitoring, without human intervention, compliance with an advertising program comprising signs to be located at a plurality of different facilities by determining the presence of one or more advertising signs at a plurality of predetermined locations, with at least one sign at each facility in the program, comprising: a tag associated with each advertising sign, the sign being displayed for advertising purposes, and the tag being adapted for RF communication; at least one RF reader at each facility for receiving tag data from each tag within range of the reader and without transferring data to the tag, where the received tag data indicates the identity of and presence of the tag and its-corresponding sign of the tag in a particular one of the predetermined locations at a facility in the program; and a hub for directly or indirectly receiving tag data from each tag at the facility and for transmitting the tag data to a remotely located computer that receives and analyzes the tag data from the plurality of different facilities to determine the identity of each sign and whether each sign is timely and properly located in each facility and thereby which advertising signs and facilities are in compliance with the advertising program.