DIFF Subgroup
H01Q 19/04 Means for collapsing H-antennas or Yagi antennas
Introduced: September 1968
Full Title
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic > Details > Means for collapsing H-antennas or Yagi antennas
No child classifications to compare. This is a leaf node in both IPC and CPC.