US PATENT SUBCLASS 30 / 158
.~.~ With blade-opening means

Current as of: June, 1999
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30 /   HD   CUTLERY

151  DF  SHEATHED {6}
155  DF  .~ Pivoted blade {3}
158.~.~ With blade-opening means {2}
159  DF  .~.~.~> Spring-opened
160  DF  .~.~.~> Locked blade

DEFINITION

Classification: 30/158

(under subclass 155) Implements in which means is provided for positively moving the blade from the sheath, either partially or wholly.

(1) Note. Does not include mere nicks in the blade to be engaged by the finger nail or some pointed instrument for the purpose of opening the blade.