DIFF Subgroup
F25C 1/18 of a particular transparency or translucency, e.g. by injecting air
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Producing ice > of a particular transparency or translucency, e.g. by injecting air
CPC:
Producing ice (F25C3/00 takes precedence) > of a particular transparency or translucency, e.g. by injecting air
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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