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Inventor
BARSTOW DONALD H
US
2 patents
Patents
2 patents
US7933390B2
Apr 26, 2011
Region-wide messaging system and methods including validation of transactions
AT & T IP I LP
13 citations
81
US7646856B2
Jan 12, 2010
Region-wide messaging system and methods including validation of transactions
AT & T IP I LP
13 citations
81