A system for virus checking a data object to be downloaded to a client device is implemented in a method including the steps of retrieving a data object to be downloaded, scanning the data object for a computer virus, and downloading the data object to the client device if no computer virus is detec...http://www.google.com/patents/US6088803?utm_source=gb-gplus-sharePatent US6088803 - System for virus-checking network data during download to a client device