DIFF Subgroup
E21C 37/16 by fire-setting or by similar methods based on a heat effect (drilling by use of heat E21B7/14)
Introduced: September 1968
Title
Titles differ between systems:
IPC: by fire-setting or by similar methods based on a heat effect
CPC: by fire-setting or by similar methods based on a heat effect (drilling by use of heat E21B7/14)
Full Title
Full titles differ between systems:
IPC:
Other methods or devices for dislodging with or without loading > by fire-setting or by similar methods based on a heat effect
CPC:
Other methods or devices for dislodging with or without loading (breaking-down by means inserted in slits E21C27/14) > by fire-setting or by similar methods based on a heat effect (drilling by use of heat E21B7/14)
No child classifications to compare. This is a leaf node in both IPC and CPC.