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发明名称
Signaling device
摘要
申请公布号
US2046698(A)
申请公布日期
1936.07.07
申请号
US19320635163
申请日期
1932.09.28
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
POWER JAMES R.
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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