• All sections
• F - Mechanical engineering; lighting; heating; weapons; blasting
• F01N - Gas-flow silencers or exhaust apparatus for machines or engines in general; gas-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 operation; Control specially adapted for catalytic conversion

Patent holdings for IPC class F01N 3/20

Total number of patents in this class: 8434

10-year publication summary

Principal owners for this class