IPC Subgroup
H01P 9/02 Helical lines
Introduced: September 1968
Last revised: January 2006
Full Title
Delay lines of the waveguide type > Helical lines
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- WAVEGUIDES; RESONATORS, LINES OR OTHER DEVICES OF THE WAVEGUIDE TYPE