IPC Subgroup
H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems
Introduced: September 1968
Last revised: January 2006
Full Title
Antenna arrays or systems > Combinations of substantially independent non-interacting antenna units or systems
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ANTENNAS, i.e. RADIO AERIALS