The misdirection would only work until someone actually read it and pointed the nonsense out, though. If it were actually intended to fool someone, it would probably be less obviously wrong. A patent for something feasibly advanced but not too out of the ordinary, or something hidden as a red herring in an actual classified document intended to be intercepted. I have a hard time believing a foreign government would waste a significant amount of time and money on American patents on woo-woo antigravity and things.

In another thread, I thought it could just be someone trolling the patent office, but I don't know.