DIFF Subgroup Additional Only
H01J 2329/4669 Insulation layers
Full Title
Electron emission display panels, e.g. field emission display panels > Arrangements of electrodes and associated parts for generating or controlling the electron beams > Insulation layers
Of 4 combined children, 0 exist in both systems.
4 codes are CPC-only extensions.
Note: 4 CPC extensions are marked as secondary classification only.