Ohio Rev. Code § 2505.22: Filing assignments of error.

In connection with an appeal of a final order, judgment, or decree of a court, assignments of error may be filed by an appellee who does not appeal, which assignments shall be passed upon by a reviewing court before the final order, judgment, or decree is reversed in whole or in part. The time within which assignments of error by an appellee may be filed shall be fixed by rule of court.