(under subclass 196) Subject matter comprising a frame which directly attaches to and holds a light admitting panel (i.e., pane) of the window and wherein the frame includes a path therethrough for the air.
(1) Note. A ventilation means which contains an air duct, but which merely attaches to the frame, is not included in this subclass unless the frame itself includes an air path therethrough.
SEE OR SEARCH CLASS
49, Movable or Removable Closures,
171, for a viewing, ventilating, or packet passage within a closure.
