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经营范围
发明名称
Synchronized sound and photography
摘要
申请公布号
US1856886(A)
申请公布日期
1932.05.03
申请号
US19280316788
申请日期
1928.11.02
申请人
ROGERS HARRISON W
发明人
ROGERS HARRISON W.
分类号
G03B31/00
主分类号
G03B31/00
代理机构
代理人
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