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发明名称
Director sight
摘要
申请公布号
US2504115(A)
申请公布日期
1950.04.18
申请号
US19440568907
申请日期
1944.12.19
申请人
MARION DICKISON JOHN
发明人
DICKISON JOHN MARION
分类号
F41G1/34
主分类号
F41G1/34
代理机构
代理人
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