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发明名称
Telephone system
摘要
申请公布号
US2289528(A)
申请公布日期
1942.07.14
申请号
US19400329609
申请日期
1940.04.15
申请人
ASSOCIATED TELEPHONE & TELEGRAPH COMPANY
发明人
TAYLOR REGINALD;BAKER GEORGE THOMAS
分类号
H04M7/06;H04Q3/00
主分类号
H04M7/06
代理机构
代理人
主权项
地址
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