| 发明名称 |
Spiral binder |
| 摘要 |
|
| 申请公布号 |
US2246489(A) |
申请公布日期 |
1941.06.24 |
| 申请号 |
US19400328182 |
申请日期 |
1940.04.06 |
| 申请人 |
FRANK F. FARKAS |
发明人 |
FARKAS EMIL N. |
| 分类号 |
B42B5/12 |
主分类号 |
B42B5/12 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
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