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发明名称
Telegraph system
摘要
申请公布号
US2306214(A)
申请公布日期
1942.12.22
申请号
US19410418695
申请日期
1941.11.12
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
HANLEY FRANK HAROLD
分类号
H04L12/26
主分类号
H04L12/26
代理机构
代理人
主权项
地址
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