The ancients were not all inventors. Neither are the moderns...
Both Melkor and Aule were gifted craftsmen among the Valar. It was said that Aule took delight in teaching his little clay miniatures his crafts (Before being chatised by Illuvator) I wondered whether Melkor cradled his orks in his arms, and sank to them the lullaby of cannibalism and murder... I think there was a passage in "HoME: Morgoth's Ring" about Melkor visiting the Edain and teaching them stuff, before demanding
interests.
"Loan of Knowledge - 40% interest rate. Lowest rate in all of Arda!" - University of Angband.