DIFF Subgroup
F23N 3/06 by conjoint operation of two or more valves or dampers (by power-assisted systems F23N3/08)
Introduced: September 1968
Title
Titles differ between systems:
IPC: by conjoint operation of two or more valves or dampers
CPC: by conjoint operation of two or more valves or dampers (by power-assisted systems F23N3/08)
Full Title
Full titles differ between systems:
IPC:
Regulating air supply or draught > by conjoint operation of two or more valves or dampers
CPC:
Regulating air supply or draught (conjointly with fuel supply F23N1/00) > by conjoint operation of two or more valves or dampers (by power-assisted systems F23N3/08)
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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