DIFF Subgroup
F04D 9/04 using priming pumps; using booster pumps to prevent vapour-lock
Introduced: September 1968
Title
Titles differ between systems:
IPC: using priming pumps; using booster pumps to prevent vapour lock
CPC: using priming pumps; using booster pumps to prevent vapour-lock
Full Title
Full titles differ between systems:
IPC:
Priming; Preventing vapour lock > using priming pumps; using booster pumps to prevent vapour lock
CPC:
Priming; Preventing vapour lock > using priming pumps; using booster pumps to prevent vapour-lock
CPC subdivides this area 4x more granularly than IPC with 3 additional codes.
3 codes are CPC-only extensions.
Child Classifications
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