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发明名称
D'ARSONVAL ELECTRICAL MEASURING INSTRUMENT
摘要
申请公布号
CA428170(A)
申请公布日期
1945.06.12
申请号
CAD428170
申请日期
申请人
THE UNITED STATES TIME CORPORATION
发明人
MANFRED JOHN JOHNSON
分类号
主分类号
代理机构
代理人
主权项
地址
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