AMD created x86_64 and holds patents on it. They and Intel have a cross-licensing agreement for various patents covering x86 and x86_64. https://en.wikipedia.o

AMD created x86_64 and holds patents on it. They and Intel have a cross-licensing agreement for various patents covering x86 and x86_64. https://en.wikipedia.org/wiki/X86-64#Licensing https://en.wikipedia.org/wiki/X86-64#Licensing