Audio-video communication system for receiving person at entrance | Patent Number 08154581
US 08154581 B2Filled DateDec 29, 2006
Priority DateOct 15, 2002
Publication DateMay 10, 2007
Expiration DateOct 15, 2022
Inventor/ApplicantsRonald Carter
ExaminesWOO, STELLA L
Art Unit2614
Technology Center2600
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