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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3/00
Window sashes, door leaves, or like elements for closing; wall or like; openings; Layout of fixed or moving closures, e.g. windows; in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
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E06B3/96
Corner joints or edge joints for windows, doors, or the like frames or wings
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E06B3/964
using separate connection pieces, e.g. T-connection pieces
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E06B3/9642
Butt type joints with at least one frame member cut off square; T-shape joints
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