H10P 90/21 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

H10P 90/21

Full Title

Preparation of wafers not covered by a single main group of this subclass, e.g. wafer reinforcement

Of 1 combined children, 0 exist in both systems.

1 codes are CPC-only extensions.

This code exists only in CPC.

Diff view requires codes present in both systems.