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发明名称
Film advancing mechanism for photographic projectors
摘要
申请公布号
US3145892(A)
申请公布日期
1964.08.25
申请号
US19610129465
申请日期
1961.08.04
申请人
GRAFLEX, INC.
发明人
HERRMANN JOHN F.
分类号
G03B1/34
主分类号
G03B1/34
代理机构
代理人
主权项
地址
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