Amiga Inc AGA patents?

[Fats]

If you actually want to make a copy of the chip by photographing the original mask, then that isn't a patent issue but a mask rights issue.
 
http://en.wikipedia.org/wiki/Integrated_circuit_layout_design_protection

No, it's both a patent problem and a mask right problem. Because by exactly copying the chip you are also using the patented idea.