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经营范围
发明名称
ELECTRIC SEISMOGRAPH DEVICE
摘要
申请公布号
CA419212(A)
申请公布日期
1944.03.21
申请号
CAD419212
申请日期
申请人
SOCONY-VACUUM OIL COMPANY
发明人
JOHN PRESTON MINTON
分类号
主分类号
代理机构
代理人
主权项
地址
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