WIRED AND WIRELESS ELECTRICAL AND ELECTRONIC APPARATUS, NAMELY WHOLE-HOUSE AUDIO DISTRIBUTION SYSTEMS CONSISTING OF AMPLIFIERS, PRE-AMPLIFIERS, AUDIO RECEIVERS, IN-WALL AND PORTABLE REMOTE CONTROL KEYPADS, AND IN-WALL SPEAKERS USED TO ENCODE AND DECODE, TRANSLATE, CONVERT AND CONTROL AUDIO, VIDEO AND INFRARED SIGNALS
Electrical and Scientific Apparatus