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发明名称
Photographic copying and viewing apparatus
摘要
申请公布号
US2773418(A)
申请公布日期
1956.12.11
申请号
US19550484291
申请日期
1955.01.26
申请人
BELL & HOWELL COMPANY
发明人
PERZENTKA THOMAS R.;PLETTNER STUART C.
分类号
G03B21/11;G03B27/50
主分类号
G03B21/11
代理机构
代理人
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地址
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