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发明名称
Sighting device for shotguns
摘要
申请公布号
US1835938(A)
申请公布日期
1931.12.08
申请号
US19280298503
申请日期
1928.08.09
申请人
EWEN SAMUEL G
发明人
EWEN SAMUEL G.
分类号
F41G1/473
主分类号
F41G1/473
代理机构
代理人
主权项
地址
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