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摘要
申请公布号
US1756885(A)
申请公布日期
1930.04.29
申请号
US19290379181
申请日期
1929.07.18
申请人
BRONSON REEL COMPANY
发明人
SCHAFER JOHN V.
分类号
G09F1/14
主分类号
G09F1/14
代理机构
代理人
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