A multi-media pointing device including a handheld, self-contained remote unit having a set of command buttons and a microphone mounted on the exterior of the remote unit housing. Contained within the housing are a pair of angular motion detectors, keyboard and motion data processing circuitry, and infrared...http://www.google.es/patents/US5339095?utm_source=gb-gplus-sharePatente US5339095 - Multi-media pointing device
