A method and system is disclosed for displaying service and maintenance information for a plurality of building sites online. A customer web portal is provided with a database for storing service information for a plurality of building sites. The web portal provides an efficient way of determining the...http://www.google.com.hk/patents/US20040143510?utm_source=gb-gplus-share專利 US20040143510 - Method and system for obtaining service information about one or more building sites
