Wisconsin has NO allowance for carrying ANY concealed weapon. Nada, Zip, nothing, can't carry concealed.
The Wisconsin statute is pretty clear on this issue:
"941.23 Carrying concealed weapon. Any person except a peace officer who goes armed with a concealed and
dangerous weapon is guilty of a Class A misdemeanor."
Were you charged with violating the above concealed weapon statute, or with possession of a swithblade (some razors can be gravity or thrust opened and a lot of states have VERY loose interpretation of what constitutes a 'switchblade').
Here is the 'switchblade' statute:
"941.24 Possession of switchblade knife.
(1) Whoever manufactures, sells or offers to sell, transports, purchases, possesses or goes armed with any knife having a blade which opens by pressing a button, spring or other device in the handle or by gravity or by a thrust or movement is guilty of a Class A misdemeanor."
I am not able to find any 'barber' exceptions to the above statutes.