| 发明名称 |
Electroacoustic transducer |
| 摘要 |
An electroacoustic transducer has an annular permanent magnet provided in a frame, and an annular top plate mounted on the permanent magnet. A ring is secured to the upper surface of the top plate. A diaphragm is secured to the ring.
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| 申请公布号 |
US2004161125(A1) |
申请公布日期 |
2004.08.19 |
| 申请号 |
US20040778217 |
申请日期 |
2004.02.17 |
| 申请人 |
FURUYA MASAHITO;KUWABARA HIRONORI |
发明人 |
FURUYA MASAHITO;KUWABARA HIRONORI |
| 分类号 |
H04R9/02;H04R7/22;H04R9/06;(IPC1-7):H04R9/06;H04R25/00 |
主分类号 |
H04R9/02 |
| 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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