发明名称 VENT WITH SCREEN OR PERFORATED ELEMENT
摘要 A vent includes an outer element including an outer perforated area having at least one perforation and an inner element having at least one perforation and a peripheral portion. The outer element and the inner element are separated by a distance to define a plenum between the outer element and the inner element.
申请公布号 US2012085051(A1) 申请公布日期 2012.04.12
申请号 US20100901263 申请日期 2010.10.08
申请人 PEREZ DAVID;ALSAGER RICHARD L. 发明人 PEREZ DAVID;ALSAGER RICHARD L.
分类号 E04B1/70;E04C2/38;E04C2/52 主分类号 E04B1/70
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