Nosferatu is the first that comes to mind that can illustrate the differences. It was considered to be in the public domain by 1930 in most countries, but than

Nosferatu is the first that comes to mind that can illustrate the differences. It was considered to be in the public domain by 1930 in most countries, but thanks to Florence Stoker who attempted to hunt down and eradicate the film at every turn, it becomes public domain in the US probably in 2041. It could be even later, depending on a few small things.