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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47/00
Operating or controlling locks or other fastening devices by electric or magnetic means
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E05B47/0001
with electric actuators; Constructional features thereof
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E05B2047/0014
Constructional features of actuators or power transmissions therefor
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E05B2047/0037
Powered actuators with automatic return to the neutral position by non-powered means, e.g. springs
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