DIFF Subgroup
G02B 6/444 Full Title
Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings > Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables (cables incorporating electric conductors and optical fibres H01B11/22)
Of 4 combined children, 0 exist in both systems.
4 codes are CPC-only extensions.