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发明名称
Signaling system
摘要
申请公布号
US2355903(A)
申请公布日期
1944.08.15
申请号
US19420448754
申请日期
1942.06.27
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BLOUNT FRANK E.
分类号
H04M15/38
主分类号
H04M15/38
代理机构
代理人
主权项
地址
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