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发明名称
TELEGRAPH REPEATER
摘要
申请公布号
CA414758(A)
申请公布日期
1943.08.24
申请号
CAD414758
申请日期
申请人
BELL TELEPHONE LABORATORIES;WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
RICHARD BARNER HEARN
分类号
主分类号
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代理人
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