| 发明名称 |
Loud speakers |
| 摘要 |
|
| 申请公布号 |
GB341531(A) |
申请公布日期 |
1931.01.19 |
| 申请号 |
GB19290031671 |
申请日期 |
1929.10.18 |
| 申请人 |
THE MAGNAVOX COMPANY |
发明人 |
|
| 分类号 |
H04R9/02;H04R9/06 |
主分类号 |
H04R9/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
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