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发明名称
Telephone system
摘要
申请公布号
US2154786(A)
申请公布日期
1939.04.18
申请号
US19360115323
申请日期
1936.12.11
申请人
ASSOCIATED TELEPHONE AND TELEGRAPH COMPANY
发明人
TAYLOR REGINALD
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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