IPC Subgroup
H01P 1/212 suppressing or attenuating harmonic frequencies
Introduced: January 1980
Last revised: January 2006
Full Title
Auxiliary devices > Frequency-selective devices, e.g. filters > suppressing or attenuating harmonic frequencies
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- WAVEGUIDES; RESONATORS, LINES OR OTHER DEVICES OF THE WAVEGUIDE TYPE