The Internet printing system for a client perform printing out to a print server that cannot circumvent a firewall by the Internet Printing Protocol (IPP). For a print server which cannot circumvent the firewall by IPP, a proxy unit which can communicate using IPP is installed on the Internet. A server...http://www.google.de/patents/US20030030843?utm_source=gb-gplus-sharePatent US20030030843 - Internet printing method, system thereof, proxy unit and print server
