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经营范围
发明名称
Electromagnetic audible signal
摘要
申请公布号
US2357743(A)
申请公布日期
1944.09.05
申请号
US19410386441
申请日期
1941.04.02
申请人
THE STANDARD ELECTRIC TIME COMPANY
发明人
KENERSON STANLEY M.
分类号
G10K1/064
主分类号
G10K1/064
代理机构
代理人
主权项
地址
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