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发明名称
Improvements in and relating to optical projection apparatus
摘要
申请公布号
GB323372(A)
申请公布日期
1930.01.02
申请号
GB19290000617
申请日期
1929.01.07
申请人
PHOTOMATON PARENT CORPORATION, LIMITED;SYDNEY VINCENT SIPPE
发明人
分类号
G03B23/12
主分类号
G03B23/12
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