No it isn't, you just need to know how to build it and what it does in simple terms. In this case, you would have to know how to CAUSE the reaction, and how to build a machine that causes the reaction, but you definitely do not need to know why the reaction is possible.
There are lots of patents for gravity operated devices. Doing so did no require a fundamental understanding about how gravity works (something physics is still arguing over to this day).
We are saddened that Mr. Gramps is towing the line for big oil. But at the same time happy because this device will not be allowed for sale and will not interfere with your opportunity to BUY ARAB OIL. Order now.
You go and try to get a patent on a device that no one knows how it works.
Get back to us after you check that out, okay?
I produce cold fusion in my garage all the time. I can't show it to you or tell you how it's done, but I do it all the time.
The next step is to sell your garage to Big Oil for a multimillion dollar payoff.
Let us know how that works out for you.
Gramps
It is difficult to get a patent on a piece of equipment when you don't have an explanation for how it works.