06490443 is referenced by 428 patents and cites 15 patents.

A proximity service unit for providing at least one predetermined service for use with multiple types of wireless devices. The proximity service unit includes a multiple channel wireless transceiver, a proximity unit validation assembly, and a legacy activation unit. The multiple channel wireless transceiver receives at least two signal types, such as infrared region signals, 900 MHz region signals, 1.8 GHz region signals, and 2.4 GHz region signals. The multiple channel wireless transceiver receives a request authorization code from each of a plurality of respective wireless devices such that the plurality of wireless devices communicate simultaneously with the multiple channel wireless transceiver without air time. The proximity unit validation assembly communicates with the multiple channel wireless transceiver and receives and validates the plurality of request authorization codes received by the multiple channel wireless transceiver. The legacy activation unit receives a service authorization code and provides at least one predetermined service for each wireless device providing the request authorization code resulting in a service authorization code.

Title
Communication and proximity authorization systems
Application Number
9/652077
Publication Number
6490443 (B1)
Application Date
August 31, 2000
Publication Date
December 3, 2002
Inventor
Charles C Freeny Jr
Dallas
TX, US
Agent
Dunlap Codding & Rogers P C
US
Assignee
Automated Business Companies
TX, US
IPC
H04B 1/38
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