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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E06B3/04
Wing frames not characterised by the manner of movement
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E06B3/263
Frames with special provision for insulation
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E06B3/2632
with arrangements reducing the heat transmission, other than an interruption in a metal section
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E06B2003/26325
the convection or radiation in a hollow space being reduced, e.g. by subdividing the hollow space
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E06B2003/2633
the insulating strips between the metal sections having ribs extending into the hollow space
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