| 发明名称 |
Attachment for ladders |
| 摘要 |
|
| 申请公布号 |
US2327317(A) |
申请公布日期 |
1943.08.17 |
| 申请号 |
US19410414372 |
申请日期 |
1941.10.09 |
| 申请人 |
RANDALL FRED D |
发明人 |
RANDALL FRED D. |
| 分类号 |
E06C7/44;E06C7/48 |
主分类号 |
E06C7/44 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
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