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发明名称
Means and method for recording sound photographically
摘要
申请公布号
US1943925(A)
申请公布日期
1934.01.16
申请号
US19290393029
申请日期
1929.09.16
申请人
OWENS FREEMAN H
发明人
OWENS FREEMAN H.
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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