No idea who the tinkerer was on this project. The handle has been cut in two places and reassembled with an aluminum support bracket. There is a cut below the lower portion which was probably not to the liking of the owner. The handle pivots, but only a few degrees left and right. Apparently some type of stop was incorporated.
There is a red plastic label on the bracket with pat pend, (patent pending) on it. That's an old trick people and companies have used for a very long time. It looks like there is a patent being filed for the item, but in many cases there isn't. That's supposed to keep the competition from duplicating your invention because there's no way to check if a patent has been filed. If it actually has, they could be in violation and the inventor can sue them for patent infringement. Some of you may remember the controversy about the Allen compound bow.