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发明名称
Distributing frame
摘要
申请公布号
US2169727(A)
申请公布日期
1939.08.15
申请号
US19370180935
申请日期
1937.12.21
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
GRAHAM FRANK H.
分类号
H04Q1/14
主分类号
H04Q1/14
代理机构
代理人
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地址
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