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DIFF Subgroup
H01P 1/2084

Full Title

Auxiliary devices (coupling devices of the waveguide type H01P5/00) > Frequency-selective devices, e.g. filters > Hollow waveguide filters (H01P1/212, H01P1/213, H01P1/215, H01P1/219 take precedence) > Cascaded cavities; Cascaded resonators inside a hollow waveguide structure (H01P1/205 takes precedence)

Of 1 combined children, 0 exist in both systems.

1 codes are CPC-only extensions.