Would that apply to very old technology like 8-bit CPUs and support chips? Would it apply to old operating systems like CP/M? I heard of some people making a t

Would that apply to very old technology like 8-bit CPUs and support chips? Would it apply to old operating systems like CP/M? I heard of some people making a toy that had expired patents on it that was a hit in the 1970s or 1980s like Rubics Cube, Mood Rings, Tinker Toys, etc.