Some states will readily adopt the ruling as pertaining also to knives, but that means some might require a permit to ccw. I was looking through state laws on AKTI.org. It looks like Wisconsin is one of the most open with respect to carrying specifically knives. The law specifically states that "'dangerous or deadly weapon' shall not apply to any knife, except in transfer to a minor." There is also no restriction on autos, balisongs, switchblades, or assisted open knives. But everything hinges on the requirement that the individual may legally 'posses' a firearm. Not 'purchase' or 'carry', just legally possess. There is also an exemption from any local law more stringent than the state law. And, no one authorized to carry can be cited for 'disorderly conduct' simply for carrying a gun or knife.
My personal view is that knives have been a primary tool for practically everyone, since the knife was invented some 7,000 years ago! A piece of printer paper is a weapon if you make it into a ball, and poke it down someone's windpipe! Absolutely anything, even water, could be a deadly weapon, because you can't breathe if you're submerged in it. Believe it or not, in China and India, every few years there is a death attributable to forcing compressed air up some guy's rectum! Governments want control over everything we let them.
No power has ever been wrested from government except by complaint!