This why IPO of $1.25=is_not_out_of_reach_MUST-SEE.... Two-way audio-video communication method for receiving person at ... www.google.com/patents/US8144183 Grant - Filed Dec 29, 2006 - Issued Mar 27, 2012 - Ronald Carter - Revolutionary Concepts, Inc. Original Assignee: Revolutionary ... Oct 30, 2007, Revolutionary Concepts, Inc. Detection and viewing system. Claims. 1. A method for two-way audio-video http://www.google.com/patents/US8144183?dq=Revolutionary+concept+inc&hl=en&sa=X&ei=rz_SUIS_B4W02wWruoDADw&ved=0CD4Q6AEwAg Companies that are now required to pay a license FEE = ADT is using the two-way audio-video http://www.texasbestalarms.com/cell-pkg-51.html http://www.texasbestalarms.com/images/ADT-47roll.jpg = GE security http://www.protectamerica.com/ge-simon-security-systems/wireless-home-alarm/copper-package = Ackerman Security System http://www.ackermansecurity.com/?pmc=homesecure&_vsrefdom=googleppc&gclid=CNed1YjEp7QCFUWnPAodwwMAVQ Now there hundreds, however these are some of top companies above... http://www.easy-home-security.net/images/how_two_way_voice_works.jpg