House Bill 2170 removes “spring-type knives” from the list of prohibited weapons to carry, either on one’s person or in purses or bags. Leave pistols and revolvers (unless you have a permit); shotguns or rifles (unless you’re hunting—with a permit, of course); daggers; bowie knives; dirk knives; switchblade knives; sword canes; knives having blades which open automatically by hand pressure applied to a button, spring, or other device in the handle of the knife; blackjacks; loaded canes; billies; hand chains; metal knuckles; or any other offending weapon at home. But, come Nov. 1, that spring-type knife is fair game. – See more at: http://thislandpress.com/roundups/eight-laws-you-didnt-know-the-oklahoma-legislature-passed-this-session/#sthash.9Sgjtf9u.dpuf
I guess Oklahomans love their switchblades. Another state to avoid visiting if you can.