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发明名称
Orientation of component crystals in composite piezo-electric devices
摘要
申请公布号
US1798101(A)
申请公布日期
1931.03.24
申请号
US19260155902
申请日期
1926.12.20
申请人
COMMUNICATION PATENTS, INC.
发明人
NICOLSON ALEXANDER MCLEAN
分类号
H03H9/17;H03H9/58
主分类号
H03H9/17
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代理人
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