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发明名称
Electromechanical signaling device
摘要
申请公布号
US1966042(A)
申请公布日期
1934.07.10
申请号
US19300455012
申请日期
1930.05.23
申请人
ASSOCIATED ELECTRIC LABORATORIES, INC.
发明人
OBERGFELL HERBERT F.
分类号
G08B5/24
主分类号
G08B5/24
代理机构
代理人
主权项
地址
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