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发明名称
DOUBLE-TWIST PHONOGRAPH STYLUS ASSEMBLY
摘要
申请公布号
CA506291(A)
申请公布日期
1954.10.05
申请号
CAD506291
申请日期
申请人
GENERAL ELECTRIC COMPANY
发明人
WILLIAM W. WARD
分类号
主分类号
代理机构
代理人
主权项
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