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发明名称
Exposure determining device for photographic cameras having cooperating indicia on camera and film magazine
摘要
申请公布号
US2493928(A)
申请公布日期
1950.01.10
申请号
US19470740054
申请日期
1947.04.08
申请人
KARL RATH
发明人
RATH KARL
分类号
G03B7/24
主分类号
G03B7/24
代理机构
代理人
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地址
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