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发明名称
Communication system
摘要
申请公布号
US2339669(A)
申请公布日期
1944.01.18
申请号
US19420453522
申请日期
1942.08.04
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BAUMFALK JOHN
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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