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摘要
申请公布号
US1921451(A)
申请公布日期
1933.08.08
申请号
US19330663689
申请日期
1933.03.31
申请人
JACOB BRENNER
发明人
BRENNER JACOB
分类号
G09D3/04
主分类号
G09D3/04
代理机构
代理人
主权项
地址
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