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发明名称
Projection microfilm reader
摘要
申请公布号
US2486157(A)
申请公布日期
1949.10.25
申请号
US19470730895
申请日期
1947.02.26
申请人
BELL & HOWELL COMPANY
发明人
HALAHAN JOHN;LYON FLOYD A.;MORTIMER LYNN H.;ARONSON THEODORE F.
分类号
G03B21/11
主分类号
G03B21/11
代理机构
代理人
主权项
地址
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