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摘要
申请公布号
US2068393(A)
申请公布日期
1937.01.19
申请号
US19340725882
申请日期
1934.05.16
申请人
BULWA
发明人
BULWA NATHAN;FEIBUSCH EMANUEL
分类号
G09F5/04
主分类号
G09F5/04
代理机构
代理人
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