I'm willing to bet that Apple has a patent on it, although I think I recall something about if the patent is a safety design then they insist that technology be shared (for a small fee I'm sure).
I actually noticed my phone was getting extremely warm and wasn't holding a charge (I posted up in the "note 3 not charging" thread). I performed a reboot and began charging via the wall charger. Thus far, the phone is back to normal temps and is charging correctly. I sure hope I'm not having the same issues the OP had, but if my phone goes kablooey, I'm going to make sure that I explain to Samsung that my Superman 1st edition mint comic was sitting near the phone, as was an original Rembrandt painting, a few signed Michael Jordan rookie cards, some Babe Ruth signed baseball cards, and Ralph Nader's business card with everything but his number burned off...