Video class room | Patent Number 09325940
US 09325940 B2Filled DateMay 13, 2010
Priority DateMay 13, 2010
Publication DateNov 17, 2011
Expiration DateMay 12, 2030
Inventor/ApplicantsVladimir Smelyansky
ExaminesNGUYEN, VAN KIM T
Art Unit2456
Technology Center2400
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