DIFF Subgroup
F23N 3/04 by operation of single valves or dampers by temperature sensitive elements
Introduced: September 1968
Title
Titles differ between systems:
IPC: by operation of single valves or dampers by temperature-sensitive elements
CPC: by operation of single valves or dampers by temperature sensitive elements
Full Title
Full titles differ between systems:
IPC:
Regulating air supply or draught > by operation of single valves or dampers by temperature-sensitive elements
CPC:
Regulating air supply or draught (conjointly with fuel supply F23N1/00) > by operation of single valves or dampers by temperature sensitive elements
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.
Child Classifications
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