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经营范围
发明名称
Improvements in or relating to photo-electric pick-ups for phonographs
摘要
申请公布号
GB552019(A)
申请公布日期
1943.03.19
申请号
GB19410011845
申请日期
1941.09.16
申请人
PHILCO RADIO AND TELEVISION CORPORATION
发明人
分类号
G11B7/00
主分类号
G11B7/00
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代理人
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