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经营范围
发明名称
Liquid compass
摘要
申请公布号
US2019411(A)
申请公布日期
1935.10.29
申请号
US19320642105
申请日期
1932.11.10
申请人
LEONARD HASSEL JUSTUS
发明人
HASSEL JUSTUS LEONARD
分类号
G01C17/00
主分类号
G01C17/00
代理机构
代理人
主权项
地址
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