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发明名称
Piezo electric device
摘要
申请公布号
US1823329(A)
申请公布日期
1931.09.15
申请号
US19240734189
申请日期
1924.08.26
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
MARRISON WARREN A.
分类号
H03H9/19
主分类号
H03H9/19
代理机构
代理人
主权项
地址
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