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发明名称
Common medium multichannel exchange system
摘要
申请公布号
US2064894(A)
申请公布日期
1936.12.22
申请号
US19340727807
申请日期
1934.05.26
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
ESPENSCHIED LLOYD
分类号
H04W99/00
主分类号
H04W99/00
代理机构
代理人
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