Delaware - Crimes and Criminal Procedure - Chapter 11 Section
   222. General definitions... (6) "Deadly weapon"
   includes... a knife of any sort (other than an ordinary
   pocketknife carried in a closed position), switchblade
   knife... razor... or any other dangerous instrument. For
   the purpose of this definition, an ordinary pocketknife
   shall be a folding knife having a blade not more than 3
   inches in length.
 - Chapter 11 Section 1442. A person is guilty of carrying a
   concealed deadly weapon when the person carries concealed
   a deadly weapon upon or about the person without a license
   to do so... a class G felony...
- Chapter 24 Section 901. No person shall engage in the
   business of selling any... stiletto... or other deadly
   weapon made especially for the defense of one's person
   without first having obtained a license therefor... This
   section shall not apply to... pocket knives or knives used
   for sporting purposes and in the domestic household, or
   surgical instruments or tools of any kind.
- Chapter 11 Section 1442. A person is guilty of carrying a
   concealed deadly weapon when the person carries concealed
   a deadly weapon upon or about the person without a license
   to do so... a class G felony...
- Chapter 11 Section 222. General definitions... (6) "Deadly
   weapon" includes... a knife of any sort (other than an
   ordinary pocketknife carried in a closed position),
   switchblade knife... razor... or any other dangerous
   instrument. For the purpose of this definition, an
   ordinary pocketknife shall be a folding knife having a
   blade not more than 3 inches in length.
- Chapter 11 Section 1446. A person is guilty of unlawfully
   dealing with a switchblade knife when he sells, offers for
   sale or has in his possession a knife, the blade of which
   is released by a spring mechanism or by gravity... an
   unclassified misdemeanor.

    Delaware Case Law:
- "Purpose. The object of this section is to prevent the
   carrying of concealed deadly weapons about the person,
   because persons becoming suddenly angered, and having such
   a weapon in their pocket, would be likely to use it, which
   in their sober moments they would not have done, and which
   could not have been done had not the weapon been upon
   their person." (1892)
- "Purpose... in enacting... was to remove the 'temptation
   and tendency' to use concealed deadly weapons under
   conditions of 'excitement.'" (1979)
- "A razor is a deadly weapon..." (1903).