In a printer system in which a plurality of virtual printers can be set, virtual printer names are properly used to select ordinary printing and security printing whose contents should be kept confidential. When print data whose contents should be kept confidential is printed, a virtual printer name...http://www.google.com.au/patents/US20030041269?utm_source=gb-gplus-sharePatent US20030041269 - Printing method, print system and program
