A method of and system for conferencing a plurality of clients over a local or wide area network using multicasting where the conferencing function is distributed between a server and the clients. The invention takes advantage of certain capabilities of existing client equipment and multicasting capabilities...http://www.google.com/patents/US6327276?utm_source=gb-gplus-sharePatent US6327276 - Conferencing over LAN/WAN using a hybrid client/server configuration
