№ EP4673692A1발명
심사 중A FIRE-RATED VENTILATION DUCT AND A METHOD OF MANUFACTURING AND/OR INSTALLING SUCH VENTILATION DUCT IN A FIRE-RATED VENTILATION DUCT STRUCTURE PENETRATION ARRANGEMENT
A FIRE-RATED VENTILATION DUCT AND A METHOD OF MANUFACTURING AND/OR INSTALLING SUCH VENTILATION DUCT IN A FIRE-RATED VENTILATION DUCT STRUCTURE PENETRATION ARRANGEMENT
❖ROCKWOOL A/SPEDERSEN, Kurt Munk; RÖDENBERGER, Jürg Dieter Stefan; THOMA, MarkusJan 6, 2026F24F, F16L, F16L +213