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经营范围
发明名称
Acoustic-cinematographic apparatus
摘要
申请公布号
US1962441(A)
申请公布日期
1934.06.12
申请号
US19300466483
申请日期
1930.07.08
申请人
WARNER BROS. PICTURES, INC.
发明人
HADDOCK ARTHUR
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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