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发明名称
Mount for negatives
摘要
申请公布号
US1797750(A)
申请公布日期
1931.03.24
申请号
US19270158541
申请日期
1927.01.03
申请人
BERGER ISIDORE S
发明人
BERGER ISIDORE S.
分类号
G03B21/64
主分类号
G03B21/64
代理机构
代理人
主权项
地址
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