DIFF Subgroup
F41G 3/2616 Full Title
Aiming or laying means (sighting devices F41G1/00; determining direction, distance or velocity by use of radio or other waves G01S; computers G06; antennas H01Q) > Teaching or practice apparatus for gun-aiming or gun-laying
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.