The US only switched to the life + 70 system in recent decades, and it doesn't retroactively apply.
I think if you add a child as a coauthor, the copyright will last longer. Nobody seems to do that, probably because it now lasts long enough for just about anybody.
I think if you add a child as a coauthor, the copyright will last longer. Nobody seems to do that, probably because it now lasts long enough for just about anybody.