| http://www.w3.org/ns/prov#value | - U.S. Pat. No. 4,138,220 to Davies et al., Apparatus for Catalytic Oxidation of Grease and Fats in Low Temperature Fumes", discloses an apparatus intended to remove odors and other hydrocarbons such as grease, fats and oils from the air stream emitted form a restaurant's cooking operations.
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