DIFF Subgroup
E21B 21/02 Swivel joints in hose-lines
Introduced: September 1968
Title
Titles differ between systems:
IPC: Swivel joints in hose lines
CPC: Swivel joints in hose-lines
Full Title
Full titles differ between systems:
IPC:
Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor > Swivel joints in hose lines
CPC:
Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (freeing objects stuck in boreholes by flushing E21B31/03) > Swivel joints in hose-lines
No child classifications to compare. This is a leaf node in both IPC and CPC.