IPC Subgroup
H01P 1/211 Waffle-iron filters; Corrugated structures
Introduced: January 1980
Last revised: January 2006
Full Title
Auxiliary devices > Frequency-selective devices, e.g. filters > Hollow waveguide filters > Waffle-iron filters; Corrugated structures
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- WAVEGUIDES; RESONATORS, LINES OR OTHER DEVICES OF THE WAVEGUIDE TYPE