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发明名称
System for producing sound motion pictures
摘要
申请公布号
US1929519(A)
申请公布日期
1933.10.10
申请号
US19280311127
申请日期
1928.10.08
申请人
ROSS OSCAR A
发明人
ROSS OSCAR A.
分类号
G03B31/00
主分类号
G03B31/00
代理机构
代理人
主权项
地址
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