I have no idea. It may have even be n a false claim. But I do believe the government can pay claim to a patent if it wants to. Like, if you invented a new kind of bomb, like say you figured out how to make a device that could create a decent amount of antimatter in a second row two, specifically loaded into a warhead, I’m pretty sure the government would take that from you and all your research. And it would be illegal to publish the design.

But I’m no lawyer and am merely guessing.