G09B 17/003 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

G09B 17/003

Full Title

Teaching reading (teaching lip-reading G09B21/00)

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.