Full Title

Window sashes, door leaves, or like elements for closing openings; Layout of fixed or moving closures, e.g. windows ; Features of rigidly-mounted outer frames relating to the mounting of wing frames (E06B5/00 takes precedence; shutters or the like E06B9/00; glass panes C03) > Doors or windows extensible when set in position (foldable wings E06B3/48; sliding wings for windows E06B3/42; wall-closing devices which may be rolled up, e.g. shutters, E06B9/11 )