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发明名称
WORLD WIDE NAVIGATIONAL SYSTEM
摘要
申请公布号
CA574505(A)
申请公布日期
1959.04.21
申请号
CAD574505
申请日期
申请人
GENERAL PRECISION LABORATORY INCORPORATED
发明人
JOHN W. GRAY;IVAN A. GREENWOOD, JR.;EVERETT B. HALES
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主分类号
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