The odd thing is that if you study occult history Demonic Possession meant that you as a sorcerer Possessed (that is had control of) a demon, not that the demon had control of him.
King Solomon was supposed to be possessed of many demons and he used them to build the Temple of Solomon with no metal fixings at all.
It is not until the New Testament times that the idea of a demon taking over a person and needing to be cast out became popular.
Technically this is called obsession not possession.