Ohio Rev. Code Ann. § 2112.42

If a guardian of the estate has been appointed in another state and an application for the appointment of a guardian of the estate is not pending in this state, the guardian of the estate appointed in the other state, after giving notice to the appointing court of an intent to register, may register a protective order or guardianship in this state by filing as a foreign judgment in a probate court of this state, in any county in which property belonging to the ward or protected person is located, certified copies of the order and letters of office and of any bond.