Cambridge, Massachusetts
United States
6
2012-06-14
The entities that hold a legal rights for patent applications filed by inventor O'Brien Mark:
Mark O'Brien from Cambridge, US has applied for patents for these inventions. The list has both pending applications and granted patents:
Audio on-demand communication system
#2 | 2009-06-04Audio-on-demand communication system
#3 | 2008-12-09Audio-on demand communication system
#4 | 2008-03-25Audio-on-demand communication system
#5 | 2006-11-30Audio-on-demand communication system
#6 | 2006-01-10Multimedia communications system and method for providing audio on demand to subscribers
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