TIL that "28 U.S. Code § 1498 - Patent and copyright cases" allows the US government to ignore patents and copyrights without permission or license.

It's not a hierarchy of enforcability but they grant different protections for different lengths of time.

So trademark is you can't call your soda Coke forever if they maintain trademark. But you can make a different identical tasting soda with a different name.

Copyright means you can't make a copy of Harry Potter until the copyright ends 70 years after the author dies. You can however make your own story about a boy who goes to wizard school and fights a previously defeated evil.

Patent gives you the most protection because they protect the idea but only last up to 20 years depending on the type. So the RISC patent meant you couldn't make a computer with fewer instructions allowing it to go faster until it expired.