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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5/00
Doors, windows, or like closures for special purposes; Border constructions therefor
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E06B5/10
for protection against air-raid or other war-like action; for other protective purposes
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E06B5/16
Fireproof doors or similar closures; Adaptations of fixed constructions therefor
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