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发明名称
Piezoelectric crystal element
摘要
申请公布号
US2483640(A)
申请公布日期
1949.10.04
申请号
US19480008677
申请日期
1948.02.16
申请人
THE BRUSH DEVELOPMENT COMPANY
发明人
JAFFE HANS
分类号
H03H9/02;H03H9/17
主分类号
H03H9/02
代理机构
代理人
主权项
地址
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