For the time being at least. Allow me to elaborate. Currently, anything over 2.5 inches with a pointed blade, locking, had some method of opening it one handed or any combination of those were deemed a concealed weapon like a firearm. This is due to a case in which a man who did nothing wrong, but was accused of being seen with a firearm near a school. To my knowledge, he had no firearm, but he did have a pocket knife that he told arresting officers was for whatever normal use and self defense. The prosecution latched onto the defensive aspect and argued in court that he was armed with a deadly weapon, won, and created a precedent that extended the law to cover all manner of knives. I have a couple of friends who are cops, so I asked them to clarify and they told me that should I ever be stopped, I should under no circumstance tell him I had a weapon on my person. By doing so I would be assigning intent to cause harm as my reason to carry a knife. Never imply your knife is anything other than a tool for specific, non-defensive purpose(s). Also that crossing city lines meant I was under different ordinance laws. Many types of knives are completely illegal, OTF, gravity, butterfly and so on, but that may change soon. Moves have been made to update the law and bring it more in line with sanity, a bill has passed the Senate almost unanimously, and currently awaits the House. https://www.legislature.ohio.gov/legislation/legislation-summary?id=GA133-SB-140 It's a slow process, but hopefully it'll pass soon.