DIFF Main Group
F02D 21/00 Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
Introduced: September 1968
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- F02D 21/06 peculiar to engines having other non-fuel gas added to combustion air IPC+CPC Available in IPC and CPC