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发明名称
Wide angle lens attachment
摘要
申请公布号
US2956475(A)
申请公布日期
1960.10.18
申请号
US19580750023
申请日期
1958.07.21
申请人
BELL & HOWELL COMPANY
发明人
HARRIS THOMAS I.;JOHNSON WALTER J.;SANDBACK IRVING C.
分类号
G02B13/04
主分类号
G02B13/04
代理机构
代理人
主权项
地址
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