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发明名称
Shutter locking device for cameras
摘要
申请公布号
US1812181(A)
申请公布日期
1931.06.30
申请号
US19280256111
申请日期
1928.02.23
申请人
THOMPSON EUGENE C
发明人
THOMPSON EUGENE C.
分类号
G03B17/42
主分类号
G03B17/42
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代理人
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