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Patent Classification Explorer PCE

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Search for IPC and CPC classification codes or keywords

E
E21
E21B
E21B 4/00
E21B 4/18

CPC Subgroup

E21B 4/18

Anchoring or feeding in the borehole

Full Title

Drives for drilling, used in the borehole > Anchoring or feeding in the borehole

CPC E21B 4/18

IPC Equivalent: E21B 4/18

2 CPC-only subgroups

E21B 4/16 E21B 4/20

Data: WIPO (IPC), EPO/USPTO (CPC) — CC BY 4.0

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