Emergency services for voice over IP telephony (E-VoIP) | Patent Publication Number 20110263219

US 20110263219 A1
Patent NumberUS 08515386 B2
Application Number13066837
Filled DateApr 25, 2011
Priority DateAug 5, 2005
Publication DateOct 27, 2011
Original Assignee
Current Assignee
Inventor/ApplicantsChristopher C. Willis
Dennis J. Hasenfang
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