DIFF Subgroup
H04B 7/208 Frequency-division multiple access
Introduced: January 1990
Full Title
Full titles differ between systems:
IPC:
Radio transmission systems, i.e. using radiation field > Relay systems > Active relay systems > Multiple access > Frequency-division multiple access
CPC:
Radio transmission systems, i.e. using radiation field (H04B10/00, H04B15/00 take precedence) > Relay systems > Active relay systems > Multiple access > Frequency-division multiple access
No child classifications to compare. This is a leaf node in both IPC and CPC.