US Patent 10028528 Exhalation smoke filter mask

An exhalation smoke filter mask includes an open first end and a perforated second end enclosing a filter assembly. The filter assembly includes a main filter assembly, having at least a carbon filter, and a masking filter assembly, having at least a fabric member infused with volatilizing odorous oils. Exhalation of smoke into the open first end effects filtering of the smoke by action of the carbon filter and malodors are masked by volatilization of odorous oils vented when breath is forced through the filter assembly. Thus secondhand smoke is mitigated, malodors are eliminated, and exhalations of smoke are concealable from bystanders and passersby.