In a real-time collaboration server, a control unit manages a collaboration mode. The control unit operates a virtual client that maintains a virtual screen reflecting the status of the collaboration (e.g., the contents of a shared desktop or whiteboard). The virtual client renders collaboration data...http://www.google.ca/patents/US20040181579?utm_source=gb-gplus-sharePatent US20040181579 - Control unit operations in a real-time collaboration server
