Ohio Rev. Code § 1310.11: Formation in general - UCC 2A-204.

(A) A lease contract may be made in any manner sufficient to show agreement, including conduct by both parties that recognizes the existence of a lease contract.

(B) An agreement sufficient to constitute a lease contract may be found although the moment of its making is undetermined.

(C) Although one or more terms of a lease contract are left open, a lease contract does not fail for indefiniteness if the parties have intended to make a lease contract and there is a reasonably certain basis for giving an appropriate remedy.