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发明名称
Perfectionnements aux appareils de lecture pour microfilms
摘要
申请公布号
FR1001921(A)
申请公布日期
1952.02.29
申请号
FRD1001921
申请日期
1946.07.02
申请人
发明人
RAT LOUIS-JULIEN DE SAINT;TAURELLE RAYMOND-EUGENE
分类号
G03B21/11
主分类号
G03B21/11
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代理人
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地址
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