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发明名称
Camera back
摘要
申请公布号
US2201511(A)
申请公布日期
1940.05.21
申请号
US19380243952
申请日期
1938.12.05
申请人
WILLIAMS HARNEY I
发明人
WILLIAMS HARNEY I.
分类号
G03B17/04
主分类号
G03B17/04
代理机构
代理人
主权项
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