I contracted for a company that has been winding torroids for 40+ yrs, and had dozens of winders. They always wished for such a machine, but it was never
possible, according to their machine suppliers. I've even had a look at the issues involved .. too hard. Don't know about this patent, looks damn complex.
The complexity / maintenance of existing winders is bad enough. It's quite an interesting engineering feat. Especially if the core centre is small, or the amount
of turns reduces it dramatically .. that's when the shlt hits the fan :-)