Device for retarding and for regulating the speed of the flow in accordions and similar musical reed instruments |
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| 申请号 | US33656640 | 申请日 | 1940-05-22 | 公开(公告)号 | US2434441A | 公开(公告)日 | 1948-01-13 |
| 申请人 | RENE SEYBOLD; | 发明人 | RENE SEYBOLD; | ||||
| 摘要 | |||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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