F04D 9/044 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

F04D 9/044

Full Title

Priming; Preventing vapour lock > using priming pumps; using booster pumps to prevent vapour-lock

Of 4 combined children, 0 exist in both systems.

4 codes are CPC-only extensions.

This code exists only in CPC.

Diff view requires codes present in both systems.