Because those technologies are dangerous to the status quo.
Seems like thats a way of investigating and probably suppressing these technologies.

Ignorance is 'their' number one tool of control.

OK. I read that thing twice. Governmentese to be sure and correspondingly difficult to parse. My reading is that the patent office is trying to avoid ridicule by accidentally issuing a patent for something that violates the laws of physics. "Perpetual motion machines" and "free energy devices" are cases in point. Obviously, people seeking patents are trying to lock up a design so they can make serious money off it. That's what patent protection is all about.

However, the patent office, backlogged by several years, has been snookered by ridiculous patents for a couple of centuries now. They granted patents on a self-spanking machine, a recirculating toilet, an anti-eating facemask, a dog waste catcher and holder, a Santa Calus detector, and a gas collector (from living cows). Every time they grant one of these patents they are subject to ridicule and hostility. They really don't care for the negative publicity. This review system is in place to try to catch the most ridiculous before they sneak through. They even granted my grandfather a patent on a garbage truck that ate its own garbage! (Patent 2,991,947 granted July 11, 1961: Garbage Emulsifier and Disposal)

Sadly, things like perpetual motion machine patent applications are a dime a dozen. Do they work? Of course not, only in the fantasies of people who post on ATS. They violate the fundamental laws of physics. Of course, people here will claim the patent office is suppressing innovation, but how can that be so?

The patent office is not in charge of innovation. It is in the business of granting exclusive rights to inventors so that they can gain a return on investment. In other words, it is a promoter of capitalism. It does not prevent the invention and distribution of anything. In fact, any humanitarian individual or non-profit corporation not interested in profit could take on one of these free-energy systems, make them, and distribute them at cost. Why wouldn't they? They would be "saving the world." In every account of any of these devices we've ever read, they are small, rather easily reproducible, require no exotic elements, and produce a prodigious amount of energy. If they really did work, they ought to be ubiquitous. Somehow, they are not. They always requires substantial "investment," and no matter how much money is tossed their way (and it's millions), they just can't quite get there and need even more money, additional investment, then, Real Soon Now, anyone who invests will be a trillionaire and the world will be saved.

Right.

If they government wants to take control of an inventor's technology, they only have to commandeer your patent with a 181 flag.