• All sections
• F - Mechanical engineeringlightingheatingweaponsblasting
• F01N - Gas-flow silencers or exhaust apparatus for machines or engines in generalgas-flow silencers or exhaust apparatus for internal-combustion engines
• F01N 3/20 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl specially adapted for catalytic conversion

Patent holdings for IPC class F01N 3/20

Total number of patents in this class: 8720

10-year publication summary

Principal owners for this class