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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E05B19/0041
characterized by the cross-section of the key blade in a plane perpendicular to the longitudinal axis of the key
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E05B19/0052
Rectangular flat keys
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E05B19/0058
with key bits on at least one wide side surface of the key
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