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发明名称
Optical system for photographic purposes
摘要
申请公布号
US1938808(A)
申请公布日期
1933.12.12
申请号
US19300502330
申请日期
1930.12.15
申请人
METRO-GOLDWYN-MAYER CORPORATION
发明人
CECCARINI OLINDO O.
分类号
G02B13/08
主分类号
G02B13/08
代理机构
代理人
主权项
地址
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