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Elizabeth Countryman
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Annapolis, MD, US
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last 30 patents
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Patent Grant
Prepaid call management in intelligent network
Patent number
6,952,575
Issue date
Oct 4, 2005
TeleCommunication Systems, Inc.
Elizabeth Countryman
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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last 30 patents
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Patent Application
Prepaid call management in intelligent network
Publication number
20070066309
Publication date
Mar 22, 2007
Elizabeth Countryman
H04 - ELECTRIC COMMUNICATION TECHNIQUE