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发明名称
Telephone system
摘要
申请公布号
US2415057(A)
申请公布日期
1947.01.28
申请号
US19450576912
申请日期
1945.02.09
申请人
AUTOMATIC ELECTRIC LABORATORIES, INC.
发明人
WICKS JOHN
分类号
H04Q3/62
主分类号
H04Q3/62
代理机构
代理人
主权项
地址
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