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经营范围
发明名称
Piezoelectric crystal plate
摘要
申请公布号
US2485131(A)
申请公布日期
1949.10.18
申请号
US19480020174
申请日期
1948.04.10
申请人
THE BRUSH DEVELOPMENT COMPANY
发明人
BAERWALD HANS G.
分类号
H03H9/17
主分类号
H03H9/17
代理机构
代理人
主权项
地址
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