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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1/00
Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
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E06B1/56
Fastening frames to the border of openings; or to similar contiguous frames
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E06B1/60
by mechanical means, e.g. anchoring means
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