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发明名称
Projection reader
摘要
申请公布号
US2782680(A)
申请公布日期
1957.02.26
申请号
US19510242126
申请日期
1951.08.16
申请人
EMPIRE STEEL PRODUCTS CORPORATION
发明人
HOWELL GEORGE BLAINE
分类号
G03B21/11
主分类号
G03B21/11
代理机构
代理人
主权项
地址
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