> It’s the only kind explicitly mentioned in the Constitution. Patents are explicitly covered there, too; from Art 1, §8: "[the United States Congress shall h

> It’s the only kind explicitly mentioned in the Constitution. Patents are explicitly covered there, too; from Art 1, §8: "[the United States Congress shall have power] To promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries." (via https://en.wikipedia.org/wiki/Copyright_Clause https://en.wikipedia.org/wiki/Copyright_Clause )