DIFF Subgroup
F01N 13/141 Full Title
Exhaust or silencing apparatus characterised by constructional features > having thermal insulation
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.
F01N 13/141 Exhaust or silencing apparatus characterised by constructional features > having thermal insulation
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.