DIFF Subgroup
H04B 7/2603 Full Title
Radio transmission systems, i.e. using radiation field (H04B10/00, H04B15/00 take precedence) > for communication between two or more posts (wireless communication networks H04W) > at least one of which is mobile
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.