IPC Subgroup
H01Q 7/02 Collapsible antennas; Retractable antennas
Introduced: September 1968
Last revised: January 2006
Full Title
Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop > Collapsible antennas; Retractable antennas
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ANTENNAS, i.e. RADIO AERIALS