Patent classifications
E
FIXED CONSTRUCTIONS
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E05
LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
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E05F
DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
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1/00
Closers or openers for wings, not otherwise provided for in this subclass
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E05F1/002
controlled by automatically acting means
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E05F1/006
by emergency conditions, e.g. fire
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