Patent classifications
E
FIXED CONSTRUCTIONS
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E06
DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
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E06B
FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
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7/00
Special arrangements or measures in connection with doors or windows
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E06B7/02
for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
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E06B7/08
Louvre doors, windows or grilles
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E06B7/084
with rotatable lamellae
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