| http://www.w3.org/ns/prov#value | - Roof ventilatorUS466046317 May 198528 Apr 1987Glidevale Building And Products, Ltd.Roof space ventilatorUS477626222 Jun 198711 Oct 1988Air Vent, Inc.Preventing insects and other pests from entering an attic spaceUS487695018 Apr 198831 Oct 1989Rudeen Richard DRoof ventilatorUS49034459 Jan 198927 Feb 1990Mankowski John PRoof ridge ventilatorsUS494269913 Oct 198924 Jul 1990Benjamin Obdyke Incorporate
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