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经营范围
发明名称
Rotation sensitive pickup
摘要
申请公布号
US2942457(A)
申请公布日期
1960.06.28
申请号
US19560564145
申请日期
1956.02.08
申请人
BELL & HOWELL COMPANY
发明人
SINK ROBERT L.
分类号
G01H1/10
主分类号
G01H1/10
代理机构
代理人
主权项
地址
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