ClassID:

137938

F01N13/146 - CPC Classification

Classification description:

Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups  - , , having thermal insulation; Double-walled exhaust pipes or housings with vacuum in the space between both walls

Recent Application in this class: