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发明名称
Door latch
摘要
A door latch for providing security in addition to that afforded by conventional key operated locks. A bar holds the door in its locked position and cooperates with a swingable plate for holding the door in a partially opened position.
申请公布号
US4017104(A)
申请公布日期
1977.04.12
申请号
US19760689092
申请日期
1976.05.24
申请人
WALKER, BROOKS
发明人
WALKER, BROOKS
分类号
E05C17/16;E05C19/00;E05C21/02;(IPC1-7):E05C17/04
主分类号
E05C17/16
代理机构
代理人
主权项
地址
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