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发明名称
Variable resistance pickup element
摘要
申请公布号
US2545737(A)
申请公布日期
1951.03.20
申请号
US19470783461
申请日期
1947.11.01
申请人
THE B. F. GOODRICH COMPANY
发明人
LUKE MARVIN B.
分类号
H04R21/04
主分类号
H04R21/04
代理机构
代理人
主权项
地址
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