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发明名称
PIEZOELECTRIC TRANSDUCER
摘要
申请公布号
EP0456968(A3)
申请公布日期
1992.12.09
申请号
EP19910102478
申请日期
1991.02.21
申请人
ALCATEL DIAL FACE S.P.A.
发明人
D'AVOLIO, ANTONIO;PESENTI, LUIGI
分类号
H04R17/00;H04M1/03;H04R;H04R1/04;H04R17/02;(IPC1-7):H04M1/03
主分类号
H04R17/00
代理机构
代理人
主权项
地址
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