| 发明名称 |
PIEZOCERAMIC TRANSDUCER FOR TELEPHONE INSTRUMENTS |
| 摘要 |
To reduce costs and to simplify assembly operations in existing piezoelectric transducers, use a printed circuit terminal board in order to eliminate wires and solderings, central piece part and cover. |
| 申请公布号 |
WO9014737(A1) |
申请公布日期 |
1990.11.29 |
| 申请号 |
WO1990EP00784 |
申请日期 |
1990.05.15 |
| 申请人 |
ALCATEL DIAL FACE S.P.A. |
发明人 |
PESENTI, LUIGI;CARBONI, ERNESTO;LOMBARDO, VINCENZO |
| 分类号 |
H04M1/03;H04R1/06;H04R17/00 |
主分类号 |
H04M1/03 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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