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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9/00
Screening or protective devices for; wall or similar; openings, with or without operating or securing mechanisms; Closures of similar construction
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E06B9/02
Shutters, movable grilles, or other safety closing devices, e.g. against burglary
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E06B9/04
of wing type, e.g. revolving or sliding
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