EIP 721: Non-fungible token improvement proposal initiated at Sep 23, 2017.
EIP 821: Distinguishable Assets Registry initiated at Dec.25, 2017
Rental standard for rival, Non-fungible token implementation improve proposal initiated at Dec 26, 2017.
Renting item on blockchain created at Nov 22, 2017
A rentable contract for movie rental created at Nov. 2017
ERC821 (decentraland): Distinguishable Assets Registry initiated at Jan. 2017