Copyright is not Trademarks is not Patents. They are different sorts of protection and rights for different sorts of intellectual property. All/Most countries

Copyright is not Trademarks is not Patents. They are different sorts of protection and rights for different sorts of intellectual property. All/Most countries that have trademark IPR require the holder to defend that right or lose it. It's not US specific. That's because you get the right to that mark because you're using it and watching for other people not to try to misuse or pass off their product/service as yours. You are not required to immediately defend copyright, because its a right you hold whether you publish your work or not. You have copyright on something basically as soon as it is fixed in a physical form (written/recorded etc). Finally, with patents, you're not required to have it in physical form, but you are required to describe it to the patent office in a way someone "skilled in the art" could reproduce. If they do that without getting permission then they have violated your patent. So your premise in your message is incorrect.