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发明名称
Telephone system
摘要
申请公布号
US1793582(A)
申请公布日期
1931.02.24
申请号
US19280268844
申请日期
1928.04.10
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
BAILEY RAND S.;NELSON STANLEY F.;SHIPLEY FRANK F.
分类号
H04Q3/42
主分类号
H04Q3/42
代理机构
代理人
主权项
地址
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Distribution device for a telcommunications system
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