DIFF Subgroup
F28D 11/04 performed by a tube or a bundle of tubes
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Heat-exchange apparatus employing moving conduits > the movement being rotary, e.g. performed by a drum or roller > performed by a tube or a bundle of tubes
CPC:
Heat-exchange apparatus employing moving conduits > the movement being rotary, e.g. performed by a drum or roller (F28D11/08 takes precedence) > performed by a tube or a bundle of tubes
No child classifications to compare. This is a leaf node in both IPC and CPC.