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发明名称
Doorcheck
摘要
申请公布号
US1759846(A)
申请公布日期
1930.05.27
申请号
US19270221001
申请日期
1927.09.21
申请人
MANHATTAN ELECTRICAL SUPPLY COMPANY, INC.
发明人
HENDRY WILLIAM F.
分类号
E05F3/16
主分类号
E05F3/16
代理机构
代理人
主权项
地址
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