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发明名称
Projecting apparatus
摘要
申请公布号
US1940148(A)
申请公布日期
1933.12.19
申请号
US19310536352
申请日期
1931.05.11
申请人
J. REX COLE;HENRY KING
发明人
SCOTT ALBERT B.
分类号
G03B21/00
主分类号
G03B21/00
代理机构
代理人
主权项
地址
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