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发明名称
Talking picture apparatus
摘要
申请公布号
US1925600(A)
申请公布日期
1933.09.05
申请号
US19290405229
申请日期
1929.11.06
申请人
OWENS FREEMAN H
发明人
OWENS FREEMAN H.
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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