Found this on New Hampshire knife laws
New Hampshire -
- 159:16. Carrying or Selling Weapons. Whoever, except as provided by the laws of this state, sells, has in his possession with intent to sell, or carries on his person any stiletto, switch knife, blackjack, dagger, dirk-knife, slung shot or metallic knuckles shall be guilty of a misdemeanor; and such weapon or articles so carried by him shall be confiscated to the use of the state.
- 159:15. Possession of Dangerous Weapon While Committing a Violent Crime. I. A person shall be guilty of a class A misdemeanor if that person uses or employs slung shot, metallic knuckles, billies, or other deadly weapon as defined in RSA 625:11, V during the commission or attempted commission of a violent crime.
- 159:24. Sale of Martial Arts Weapons.
I. "Martial arts weapon" means any kind of sword, knife,
spear, throwing star, throwing dart, or nunchaku or any
other object designed for use in the martial arts which
capable of being used as a lethal or dangerous weapon.
II. Any person who shall sell, deliver, or otherwise
transfer any martial arts weapon to a person under the age
of 18... shall be guilty of a misdemeanor... [exempts
parents, guardians, and those to whom they give written
permission].
- 159:3 Convicted Felons.
I. A person is guilty of a class B felony if he:
(a) Owns or has in his possession or under his control, a... metallic knuckles, billies, stiletto, switchblade knife, sword cane, blackjack, dagger, dirk-knife, or other deadly weapon as defined in RSA 625:11, V; and
(b) Has been convicted in either a state or federal court in this or any other state, the District of Columbia, the Commonwealth of Puerto Rico, or any territory or possession of the United States of:
(1) A felony against the person or property of another; or
(2) A felony under RSA 318-B; or
(3) A felony violation of the laws of any other state, the District of Columbia, the United States, the Commonwealth of Puerto Rico or any territory or possession of the United States relating to controlled drugs as defined in RSA 318-B.
II. The state shall confiscate to the use of the state the weapon or weapons of persons convicted under this section.
III. It is an affirmative defense to a charge under this section that a felony of which a defendant has been convicted in another jurisdiction would not have constituted a felony in the state of New Hampshire at the time such felony was committed.
- 625:11 General Definitions.
V. "Deadly weapon'' means any firearm, knife or other substance or thing which, in the manner it is used, intended to be used, or threatened to be used, is known to be capable of producing death or serious bodily injury.
VI. "Serious bodily injury'' means any harm to the body which causes severe, permanent or protracted loss of or impairment to the health or of the function of any part of the body.