Ventilating window or door has acoustically insulating ducts - pref. contg. filters in top and bottom frame members
DE3012283A1
Sliding window or door ventilation - involves slotted bar or rail mounted in wall opening or blind frame
CH639724A5
Door or window leaf
DE2806332A1
Wooden window or door wing frame - has upright pieces set between double boards of horizontal pieces
DE2622170A1
Universal window ventilating and fly screen grill - has folded perforated pref. resilient plastic netting strip
DE2621365A1
Sealing for framed glass pane in fixed frame - has e.g. rubber or plastics strips positioned on fixed frame to lie directly against pane leaving no overlap exposed to elements
