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发明名称
Perfectionnements apportés aux appareils doubles destinés à la projection d'images cinématographiques
摘要
申请公布号
FR861549(A)
申请公布日期
1941.02.11
申请号
FRD861549
申请日期
1939.11.14
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
G03B21/40
主分类号
G03B21/40
代理机构
代理人
主权项
地址
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