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发明名称
Audible signaling device
摘要
申请公布号
US2412610(A)
申请公布日期
1946.12.17
申请号
US19440559635
申请日期
1944.10.20
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
GENT EDGAR W.
分类号
G10K1/062
主分类号
G10K1/062
代理机构
代理人
主权项
地址
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