The "common" pocket knife thing is crap in my opinion. Very vague. They say anything can be carried "openly", but do not define what that means as far as I can tell. Is clipped to your pocket considered "openly" or not?
If you look here and read down to some of the cases its silly to say the least.
http://www.knifeup.com/florida-knife-laws-explained/However, if the pocket knife has too many features, it might not be a “common pocket knife.” The case of F.R. vs State in 2012 found that 3 inch pocket knife with serrations, a notch grip, hilt guard, and locking mechanism does not count as a “common pocket knife.” If his knife did not have serrations, a notch grip, hilt guard, and locking mechanism, it might of been a “common pocket knife.”
So having a choil, finger guard, and a lock is not common?

Bullsmurf if you ask me.
also
If the knife was designed for utility and not harm, it is not a deadly weapon. In the case of Holley v. State in 2004, it was found that a box cutter or razor knife does not qualify as a deadly weapon because it was designed for utility not bodily harm.
They are saying if its not a razor or box cutter its a deadly weapon and was designed to kill people? So they are saying when Chris Reeve designed his knife he thought....... "Hmmm....... I'm going to make a man killer and name it the Sebenza"...... Uhhhh. I think not.
Complete bullsmurf again.

Sorry i'm no help, but just looking into it after reading your thread got me going. I hate laws like this. From what I can tell if its over a 4" blade do not carry it concealed.