Patent classifications
E
FIXED CONSTRUCTIONS
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E05
LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
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E05B
LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
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63/00
Locks; or fastenings; with special structural characteristics
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E05B63/0065
Operating modes; Transformable to different operating modes
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E05B63/0069
Override systems, e.g. allowing opening from inside without the key, even when locked from outside
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