I can only tell you Massachusetts law and Rhode Island. In Mass. under Mass. General Laws C.269-S.10 different weapons are listed as illegal, such as double edged knives, switch blades, stillettos, nunchuka, shurikens, black jacks, sap gloves, etc.
Of course the dangerous weapon statute can be applied to anything used as a weapon in a fights as some have already stated.
Rhode Island is more liberal as the martial arts weapons mentioned above and others aren't illegal to possess by statute. As far as assault and battery goes, martial arts experience, boxing and so forth is not listed anywhere in the books as to have any bearing on charges if used in a fight.
Of course a kick used with a heavy boot or shoe considered a shod foot and can be charged with a felony (dangerous weapon-shod foot) rather then a misdemeanor.
Years ago, shod foot, the felony could be charged with any covering over the foot, ex. moccasins, sneakers.
However, with the popularity of the martial arts many were kicking much more often on the street and many were charged with felonious A&B (D/W-dangerous weapon-shod foot)- so in the early 80's the District Attorney's Office started reducing the charge to a misdemeanor if the shoe worn was like a sneaker or moccasin.