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发明名称
Navigational systems
摘要
申请公布号
US2724831(A)
申请公布日期
1955.11.22
申请号
US19520297222
申请日期
1952.07.01
申请人
MARCEL WALLACE
发明人
WALLACE MARCEL
分类号
G01S1/22;G01S13/46
主分类号
G01S1/22
代理机构
代理人
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地址
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