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发明名称
Signaling system
摘要
申请公布号
US2043417(A)
申请公布日期
1936.06.09
申请号
US19350042088
申请日期
1935.09.25
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
MITCHELL DOREN
分类号
H04B3/06
主分类号
H04B3/06
代理机构
代理人
主权项
地址
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