Ohio Rev. Code § 2101.05: Oaths and depositions.

A probate judge may administer oaths, take acknowledgment of instruments in writing required to be acknowledged, and take depositions.

Depositions taken according to sections 2319.05 to 2319.31, inclusive, of the Revised Code, to be used on the trial of civil cases, may be taken and used on the trial of any question before the probate court.