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发明名称
Apparatus for measuring the ratio or product of two alternating voltages
摘要
申请公布号
US2419852(A)
申请公布日期
1947.04.29
申请号
US19440523023
申请日期
1944.02.19
申请人
GEOPHYSICAL RESEARCH CORPORATION
发明人
OWEN JOHN E.
分类号
G01R27/12;G06G7/163
主分类号
G01R27/12
代理机构
代理人
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地址
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