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发明名称
Automatic signal responsive device
摘要
申请公布号
US2235804(A)
申请公布日期
1941.03.18
申请号
US19370132551
申请日期
1937.03.23
申请人
FEDERAL TELEGRAPH COMPANY
发明人
MACALPINE WILLIAM WALTER
分类号
H04L15/26
主分类号
H04L15/26
代理机构
代理人
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地址
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