DIFF Subgroup
F01B 29/02 Atmospheric engines, i.e. atmosphere acting against vacuum
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Machines or engines with pertinent characteristics other than those provided for in main groups > Atmospheric engines, i.e. atmosphere acting against vacuum
CPC:
Machines or engines with pertinent characteristics other than those provided for in preceding main groups > Atmospheric engines, i.e. atmosphere acting against vacuum
No child classifications to compare. This is a leaf node in both IPC and CPC.