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发明名称
Piezoelectric element of p-type crystal
摘要
申请公布号
US2463109(A)
申请公布日期
1949.03.01
申请号
US19440539312
申请日期
1944.06.08
申请人
THE BRUSH DEVELOPMENT COMPANY
发明人
JAFFE HANS
分类号
H03H9/17
主分类号
H03H9/17
代理机构
代理人
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