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发明名称
PHONOGRAPHIC APPARATUS
摘要
申请公布号
CA470243(A)
申请公布日期
1950.12.19
申请号
CAD470243
申请日期
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
CHARLES C. DAVIS
分类号
主分类号
代理机构
代理人
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地址
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