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发明名称
Telephone system
摘要
申请公布号
US1760626(A)
申请公布日期
1930.05.27
申请号
US19280280427
申请日期
1928.05.25
申请人
RESERVE HOLDING COMPANY
发明人
BELLAMY JOHN I.
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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