DIFF Main Group
F23L 15/00 Heating of air supplied for combustion
Introduced: September 1968
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Child Classifications
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F23L 15/00 Introduced: September 1968
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Navigate with arrow keys, Enter to open