US PATENT SUBCLASS 102 / 309
.~.~.~ Having a barrier

Current as of: June, 1999
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102 /   HD   AMMUNITION AND EXPLOSIVES

301  DF  BLASTING {11}
305  DF  .~ Detonation wave modifying {1}
306  DF  .~.~ Shaped charge or charge with detonation wave cavity modifier {4}
309.~.~.~ Having a barrier

DEFINITION

Classification: 102/309

Having a barrier:

(under subclass 306) Subject matter which includes a member to direct and alter the detonation wave through the charge, when detonated, to the cavity.