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发明名称
Manually powered zooming mechanism
摘要
申请公布号
US3259044(A)
申请公布日期
1966.07.05
申请号
US19630326632
申请日期
1963.11.27
申请人
BELL & HOWELL COMPANY
发明人
MACMILLIN DAVID M.;ARNASON ARNI
分类号
G03B17/14
主分类号
G03B17/14
代理机构
代理人
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地址
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