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发明名称
Self view finder for portrait photography
摘要
申请公布号
US2496404(A)
申请公布日期
1950.02.07
申请号
US19460642260
申请日期
1946.01.19
申请人
MICHEL PAILLAIS JEAN
发明人
PAILLAIS JEAN MICHEL
分类号
G03B17/53
主分类号
G03B17/53
代理机构
代理人
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地址
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