Means

Full Title

Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups > Means

Of 2 combined children, 0 exist in both systems.

2 codes are CPC-only extensions.

Note: 2 CPC extensions are marked as secondary classification only.

This code exists only in CPC.

Diff view requires codes present in both systems.