IPC Subgroup
H01P 1/2 Frequency-selective devices, e.g. filters
Introduced: September 1968
Last revised: January 2006
Full Title
Auxiliary devices > Frequency-selective devices, e.g. filters
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- WAVEGUIDES; RESONATORS, LINES OR OTHER DEVICES OF THE WAVEGUIDE TYPE
Related Keywords
FILTER(S) of waveguide typewaveguide devices for FREQUENCY selection
6 direct subcodes
Child Classifications
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- H01P 1/201 Filters for transverse electromagnetic waves
- H01P 1/207 Hollow waveguide filters
- H01P 1/212 suppressing or attenuating harmonic frequencies
- H01P 1/213 combining or separating two or more different frequencies
- H01P 1/215 using ferromagnetic material
- H01P 1/219 Evanescent mode filters