DIFF Subgroup
G02B 5/1876 Full Title
Optical elements other than lenses (light guides G02B6/00; optical logic elements G02F3/00) > Diffraction gratings
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
G02B 5/1876 Optical elements other than lenses (light guides G02B6/00; optical logic elements G02F3/00) > Diffraction gratings
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.