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摘要
申请公布号
US2127906(A)
申请公布日期
1938.08.23
申请号
US19380202677
申请日期
1938.04.18
申请人
ESCH CARLETON B
发明人
ESCH CARLETON B.
分类号
G09F1/10
主分类号
G09F1/10
代理机构
代理人
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