what happened to the dwarves' rings

[Mat_Heathertoes]

Sauron possesses 3 of the 7, including Thrors ring, taken from Thrain, his son in the dungeons of Dol Goldur. The rest are in the bellies of various unnamed dragons.

'The Three, fairest of all, the Elf-lords hid from him, and his hand never touched them or sullied them. Seven the Dwarf-kings possessed, but three he has recovered, and the others the dragons have consumed. Nine he gave to Mortal Men, proud and great, and so ensnared them.