Patent classifications
E
FIXED CONSTRUCTIONS
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E05
LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
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E05D
HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
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15/00
Suspension arrangements for wings
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E05D15/28
supported on arms movable in horizontal plane
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E05D15/32
with two pairs of pivoted arms
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E05D15/34
with wings opening parallel to themselves
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