Ohio Revised Code Title XXIX. Crimes Procedure § 2938.05

Claim of jury, once made, may be withdrawn by written waiver of jury but in such case the court may, if a jury has been summoned, require accused to pay all costs of mileage and fees of the summoned jurors for one day's service, notwithstanding the outcome of the case. No withdrawal of claim for jury shall effect any re-transfer of a case, once it has been certified to a court of record.