Patent classifications
E
FIXED CONSTRUCTIONS
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E05
LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
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E05C
BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
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7/00
Fastening devices specially adapted for two wings
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E05C2007/007
for a double-wing sliding door or window, i.e. where both wings are slidable
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