Ohio Rev. Code § 1331.08
In addition to the civil and criminal penalties provided in sections 1331.01 to 1331.14 of the Revised Code, the person injured in the person's business or property by another person by reason of anything forbidden or declared to be unlawful in those sections, may sue therefor in any court having jurisdiction and venue thereof, without respect to the amount in controversy, and recover treble the damages sustained by the person and the person's costs of suit. When it appears to the court, before which a proceeding under those sections is pending, that the ends of justice require other parties to be brought before the court, the court may cause them to be made parties defendant and summoned, whether or not they reside in the county where the action is pending.
R.C. §1331.08