the movement being rotary, e.g. performed by a drum or roller (F28D11/08 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: the movement being rotary, e.g. performed by a drum or roller

CPC: the movement being rotary, e.g. performed by a drum or roller (F28D11/08 takes precedence)

Full titles differ between systems:

IPC:

Heat-exchange apparatus employing moving conduits > the movement being rotary, e.g. performed by a drum or roller

CPC:

Heat-exchange apparatus employing moving conduits > the movement being rotary, e.g. performed by a drum or roller (F28D11/08 takes precedence)

Of 2 combined children, 1 exist in both systems.

1 codes are CPC-only extensions.

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F28D 11/025 CPC only CPC only
F28D 11/04 performed by a tube or a bundle of tubes IPC+CPC Available in IPC and CPC

Class F28,2013–2023, worldwide · Source: EPO PATSTAT

Class F28,2013–2023, worldwide · Source: EPO PATSTAT