It is a matter of public record that Gateway retained ownership of the patents with Amiga Inc. only having a royalty free license to use them within the framework of AmigaOS.
It is also incorrect to claim that all of these patents have already expired. Patent protection lasts for 20 years and some of the patents date back to 1987 meaning that some will only expire in 2007, not before.
Furthermore, Amiga Inc. holds several US and EC Amiga trademarks.
This too is a matter of public record.