DIFF Subgroup
H01P 1/209 comprising one or more branching arms or cavities wholly outside the main waveguide
Introduced: January 1980
Full Title
Full titles differ between systems:
IPC:
Auxiliary devices > Frequency-selective devices, e.g. filters > Hollow waveguide filters > comprising one or more branching arms or cavities wholly outside the main waveguide
CPC:
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) > comprising one or more branching arms or cavities wholly outside the main waveguide
No child classifications to compare. This is a leaf node in both IPC and CPC.