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发明名称
Electromagnetic door holder and releaser
摘要
申请公布号
US3258875(A)
申请公布日期
1966.07.05
申请号
US19650459232
申请日期
1965.05.27
申请人
BARTH SAFETY EQUIPMENT CO., INC.
发明人
ULMAN AMBROSE C.
分类号
E05C17/56
主分类号
E05C17/56
代理机构
代理人
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