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经营范围
发明名称
Earth inductor compass
摘要
申请公布号
US2246558(A)
申请公布日期
1941.06.24
申请号
US19390261795
申请日期
1939.03.14
申请人
WASHINGTON INSTITUTE OF TECHNOLOGY, INC.
发明人
WASHBURN CLARENCE L.
分类号
G01C17/36
主分类号
G01C17/36
代理机构
代理人
主权项
地址
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