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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39/00
Locks giving indication of; authorised; or unauthorised unlocking
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E05B39/007
Indication by a tactile impulse to the user, e.g. vibration of a lock-, handle- or key-part
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