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经营范围
发明名称
Directional sound detector
摘要
申请公布号
US2534847(A)
申请公布日期
1950.12.19
申请号
US19470764681
申请日期
1947.07.30
申请人
JEAN AUSCHER
发明人
AUSCHER JEAN
分类号
G01S1/72
主分类号
G01S1/72
代理机构
代理人
主权项
地址
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