| 发明名称 |
Microphone |
| 摘要 |
|
| 申请公布号 |
FR749076(A) |
申请公布日期 |
1933.07.18 |
| 申请号 |
FRD749076 |
申请日期 |
1933.01.14 |
| 申请人 |
|
发明人 |
NEUMANN GEORG |
| 分类号 |
H04R19/00;H04R19/04 |
主分类号 |
H04R19/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
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