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发明名称
Footage indicator for motion-picture cameras
摘要
申请公布号
US1812068(A)
申请公布日期
1931.06.30
申请号
US19290363767
申请日期
1929.05.17
申请人
FERDINAND VICTOR ALEXANDER
发明人
VICTOR ALEXANDER FERDINAND
分类号
G03B21/43
主分类号
G03B21/43
代理机构
代理人
主权项
地址
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