An apparatus for transmitting and receiving spoken utterances over a local area network (LAN) in near-real-time. The type of LANs include both wireless LANs (e.g., radio frequency LANs) and wired LANs (e.g., a Novell network). A User depresses computer mouse buttons to initiate or terminate speaking...http://www.google.de/patents/US5815553?utm_source=gb-gplus-sharePatent US5815553 - Apparatus for voice communication over local area networks
