IPC Main Group
H01Q 25/00 Antennas or antenna systems providing at least two radiating patterns
Introduced: January 1980
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ANTENNAS, i.e. RADIO AERIALS
2 direct subcodes
Child Classifications
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- H01Q 25/02 providing sum and difference patterns
- H01Q 25/04 Multimode antennas