DIFF Subgroup
F23Q 7/001 Full Title
Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes (circuits therefor H01T15/00); Electrically-heated glowing plugs
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Note: 2 CPC extensions are marked as secondary classification only.