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发明名称
Call distributing system
摘要
申请公布号
US2167733(A)
申请公布日期
1939.08.01
申请号
US19370164639
申请日期
1937.09.20
申请人
ASSOCIATED ELECTRIC LABORATORIES, INC.
发明人
WICKS JOHN
分类号
H04M3/523
主分类号
H04M3/523
代理机构
代理人
主权项
地址
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