DIFF Subgroup
H01P 1/207 Hollow waveguide filters (H01P1/212, H01P1/213, H01P1/215, H01P1/219 take precedence)
Introduced: January 1980
Title
Titles differ between systems:
IPC: Hollow waveguide filters
CPC: Hollow waveguide filters (H01P1/212, H01P1/213, H01P1/215, H01P1/219 take precedence)
Full Title
Full titles differ between systems:
IPC:
Auxiliary devices > Frequency-selective devices, e.g. filters > Hollow waveguide filters
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)
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1980.
Child Classifications
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- H01P 1/208 Cascaded cavities; Cascaded resonators inside a hollow waveguide structure (H01P1/205 takes precedence) since 1980 +3 CPC IPC+CPC Available in IPC and CPC
- H01P 1/209 comprising one or more branching arms or cavities wholly outside the main waveguide since 1980 IPC+CPC Available in IPC and CPC