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发明名称
SIGNAL RECORDING APPARATUS
摘要
申请公布号
CA431432(A)
申请公布日期
1945.11.20
申请号
CAD431432
申请日期
申请人
THE WESTERN UNION TELEGRAPH COMPANY
发明人
RALEIGH JOHNSON WISE
分类号
主分类号
代理机构
代理人
主权项
地址
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