If you read the patent carefully, item 7 states that cd-rom is an absolute requirement. C64 is not cd-rom, is it? However, I agree that it is objectionable tha

If you read the patent carefully, item 7 states that cd-rom is an absolute requirement. C64 is not cd-rom, is it? However, I agree that it is objectionable that it is a patent on a different medium. I doubt if they were able to get all of them for dvd and blu-ray! https://patents.google.com/patent/JP2742394B2/en https://patents.google.com/patent/JP2742394B2/en