DIFF Subgroup
F04D 29/58 Cooling (of machines or engines in general F01P); Heating; Diminishing heat transfer
Introduced: September 1968
Title
Titles differ between systems:
IPC: Cooling; Heating; Diminishing heat transfer
CPC: Cooling (of machines or engines in general F01P); Heating; Diminishing heat transfer
Full Title
Full titles differ between systems:
IPC:
Details, component parts, or accessories > Cooling; Heating; Diminishing heat transfer
CPC:
Details, component parts, or accessories (machine elements in general F16) > Cooling (of machines or engines in general F01P); Heating; Diminishing heat transfer
Of 4 combined children, 0 exist in both systems.
4 codes are CPC-only extensions.
Child Classifications
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