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Publication of FR459578ApublicationCriticalpatent/FR459578A/fr
E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
E06B7/00—Special arrangements or measures in connection with doors or windows
E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
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FR459578D1912-06-231913-06-23Procédé pour la fabrication de ventilateurs en verre
ExpiredFR459578A
(fr)