Symantec's Patch Patent
Here is the description of the patent. Thanks Bucher Olivier.According to a statement issued by Symantec, the technology "may be also be used to update general computer readable files, which may include data files, program files, database files, graphics files, or audio files. As the patent holder, Symantec is the only company authorized to incorporate this sophisticated technology into its best-of-breed products."
In an interview with Reuters, Carey Nachenberg, a researcher at Symantec and the patent holder, said "We have no desire to proactively pursue litigation in regards to these patents."