I live in Kentucky so I can pretty well carry what I please. Sometimes I carry my Ontario Ranger RD-4 Bush under a jacket. I have a custom Kydex sheath with a Tek-Lok positioned for high ride carry. It's kind of like carrying a full size pistol. It's easy to do with the right holster.
That's not really true.
This is straight from the CCDW class, Department of Criminal Justice Training, Applicant Manual, 4th edition-A
KY classifies the following as a deadly weapon:
Weapon of mass destruction
Any weapon from which a shot, readily capable of producing death or other serious physical injury, may be discharged
Any knife other than an ordinary pocket knife or hunting knife
Billy, nightstick, club
Blackjack or slapjack
Nunchaku
Shuriken or death stars
Artificial knuckles made from metal, plastic, or other similar hard material.
It's illegal to carry any of these concealed if you don't have a CCDW permit.
In the class I was in, knives were described in detail. What they said, basically, is that if it's not a slipjoint or a traditional lockback style folder (Buck 110, etc), it's considered a deadly weapon. For fixed blades, an ordinary hunting knife like the Schrade Old Timers, Buck, Case, etc. Any other fixed blades are considered concealed deadly weapons, including kitchen/butcher knives (specifically mentioned these).
If you get caught with the RD4 concealed (and no permit), you're going to nailed.
I'm friends with lots of police officers and they know I'm a knife nut. I was told several times in the past that the folders I carried were on the line... if I got stopped/checked and the cop was cool, I was going to be fine. If the cop wasn't, then I was going to be busted. All of the folders were one hand opening jobs from Kershaw, Spyderco, Benchmade, etc.
I exercised my 2nd amendment rights and got the CCDW permit. Now I don't worry about it. I carry whatever I want to.