专利名称：AIR FILTRATION APPARATUS AND METHOD发明人：Cecil E. Campbell,Lonnie David Cooper, SR.申请号：US12236617申请日：20080924
公开号：US20100071699A1公开日：20100325
专利附图：
摘要：An air filtration apparatus is disclosed. During inhale response, user's breathopens a first air valve causing air flow through replaceable filter through a chamber to amouth piece disposed in a user's mouth. During exhale response, user's breath closesfirst valve causing one or more exhaust valves to open. In one embodiment, inhale and
exhale responses are displaced from one another to provide better isolation ofreplaceable filter.
申请人：Cecil E. Campbell,Lonnie David Cooper, SR.
地址：San Pedro CA US,Prescott AZ US
国籍：US,US
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