DIFF Subgroup
H01P 1/20327 Full Title
Auxiliary devices (coupling devices of the waveguide type H01P5/00) > Frequency-selective devices, e.g. filters > Filters for transverse electromagnetic waves (H01P1/212, H01P1/213, H01P1/215, H01P1/219 take precedence) > Strip line filters
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.