DIFF Subgroup
F25D 17/06 by forced circulation
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces > for circulating gas, e.g. by natural convection > by forced circulation
CPC:
Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces > for circulating air, e.g. by convection > by forced circulation
CPC subdivides this area 3x more granularly than IPC with 2 additional codes.
2 codes are CPC-only extensions.
Child Classifications
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