> [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.
Also, I'd be careful at taking the reasoning of political documents at face value. Many items in the Constitution are post-hoc, Lockeian/liberal justifications for a social order that was in fact largely copied over wholesale from English parliamentary monarchy, with surprisingly few tweaks.