DIFF Main Group
E21C 45/00 Methods of hydraulic mining; Hydraulic monitors (E21C25/60 takes precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Methods of hydraulic mining; Hydraulic monitors
CPC: Methods of hydraulic mining; Hydraulic monitors (E21C25/60 takes precedence)
Full Title
Full titles differ between systems:
IPC:
Methods of hydraulic mining; Hydraulic monitors
CPC:
Methods of hydraulic mining; Hydraulic monitors (E21C25/60 takes precedence)
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
IPC defines codes here since 1990.
Child Classifications
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- E21C 45/08 Automatic or remote control of hydraulic monitors since 1990 IPC+CPC Available in IPC and CPC