E21B 31/007 — | Patent Classification Explorer

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E
E21
E21B
E21B 31/00
E21B 31/007

CPC Subgroup

E21B 31/007

Full Title

Fishing for or freeing objects in boreholes or wells

CPC E21B 31/007

No direct equivalent in IPC

4 CPC-only subgroups

E21B 31/005 E21B 31/03

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

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