Original window trade vintage catalog for IDEAL VENTILATOR COMPANY. Main office and factory was located at 160 Atlantic Avenue, Providence, RI. Originators and patentees of Glass Widow Ventilators. Ventilate the Ideal Way. Air flow regulated. Used in the Empire State Building, Manhattan College, Johns-Hopkins Hospital, American Oil Company, Harvard University, Standard Oil Company, US Weather Bureau and more. Unbound from a large 1938 architectural catalog, this unique old one page technical brochure would display wonderful matted and framed. Nice graphics. A fabulous addition to your retro window ventilators library. Pages are detached and may contain a small amount of residual glue on edge.