F01N 3/04

Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids

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data.epo.org/linked-data/def/cpc/F01N3-04

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Patent classification

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F01N 3/043

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Cooperative Patent Classification

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F01N 3/02

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