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发明名称
Means and method for protecting piezoelectric units
摘要
申请公布号
US2266768(A)
申请公布日期
1941.12.23
申请号
US19410382303
申请日期
1941.03.08
申请人
THE BRUSH DEVELOPMENT COMPANY
发明人
KORNEI OTTO
分类号
H03H3/02;H03H9/10
主分类号
H03H3/02
代理机构
代理人
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