DIFF Subgroup
F01P 11/20 concerning atmospheric freezing conditions, e.g. automatically draining or heating during frosty weather
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Component parts, details, or accessories, not provided for in, or of interest apart from, groups > Indicating devices; Other safety devices > concerning atmospheric freezing conditions, e.g. automatically draining or heating during frosty weather
CPC:
Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00 > Indicating devices; Other safety devices > concerning atmospheric freezing conditions, e.g. automatically draining or heating during frosty weather
No child classifications to compare. This is a leaf node in both IPC and CPC.