Video class room | Patent Number 09325940

US 09325940 B2
Application Number12779794
Publication NumberUS 20110283008 A1
Pendency5 years, 11 months, 20 days
Filled 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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