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Class Information
Number: 175/3.5
Name: Boring or penetrating the earth > Boring with explosion in inaccessible hole > Explosive charge carried by projectile
Description: Subject matter in which a projectile containing an explosive charge is described as forming a bore as it is projected into the formation by an explosive charge and the explosive charge carried by the projectile is then fired.

Patents under this class:

Patent Number Title Of Patent Date Issued
7896104 Device and method for explosive drilling Mar. 1, 2011
5540293 Firing Head Jul. 30, 1996
4889183 Method and apparatus for retaining shaped charges Dec. 26, 1989
4088368 Method for explosive breaking of hard compact material May. 9, 1978

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