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经营范围
发明名称
Dispositif pour l'enregistrement photographique du son sur film
摘要
申请公布号
FR748871(A)
申请公布日期
1933.07.12
申请号
FRD748871
申请日期
1932.04.02
申请人
发明人
CHAROLLAIS HENRI;PICOT MICHEL
分类号
G03B31/02
主分类号
G03B31/02
代理机构
代理人
主权项
地址
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