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发明名称
Telephone system
摘要
申请公布号
US1990677(A)
申请公布日期
1935.02.12
申请号
US19320600272
申请日期
1932.03.21
申请人
ASSOCIATED TELEPHONE AND TELEGRAPH COMPANY
发明人
TAYLOR REGINALD;BELAS FRANCIS TATLOCK;MCCLEW JOHN WILLIAM
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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