US PATENT SUBCLASS 175 / 4.5
.~ Directing successive projectiles or charges in same path

Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

2  DF  BORING WITH EXPLOSION IN INACCESSIBLE HOLE {12}
4.5.~ Directing successive projectiles or charges in same path

DEFINITION

Classification: 175/4.5

(under subclass 2) Subject matter directed to plural charges or bullets which are fired through the same gun barrel and/or in succession in the same direction and along the same line into the formation without removing the firing apparatus from the hole.