79051969
Feb 15, 2008
Apr 14, 2009
AUDIO SYSTEMS AND MULTI-ROOM AUDIO SYSTEMS COMPRISING AN APPARATUS FOR RECORDING, TRANSMITTING AND REPRODUCING SOUND AND AUDIO VISUAL SIGNALS BY ANALOGUE OR DIGITAL MEANS, POWER MODULES, VOLUME CONTROLS, KEYPADS, HUBS, INTERCOMS AND POWER SUPPLIES
Electrical and Scientific Apparatus