Knife Rights’ Ohio Knife Law Reform Bill Signed by Governor! U.S.A. –-(AmmoLand.com)- Monday, April 12, is the enactment date for SB 140, Knife Rights’ Ohio Knife Law Reform bill. Effective April 12th, Ohio knife law is changed in the following manner: The ban on manufacture and sale of “switchblade,” “spring blade” and “gravity” knives is repealed. Possession and open carry has always been legal and concealed carry was legal except for the jeopardy inherent in the extreme vagueness of Ohio’s concealed “deadly weapon” law. The issue of that troublesome vagueness is now cleared up because a knife, razor or cutting instrument can no longer be considered a “deadly weapon” or “weapon” when concealed unless it is used as a weapon. This allows carrying any knife concealed under state law unless it is actually used as a weapon to commit an illegal act.