| 发明名称 |
Door opener |
| 摘要 |
|
| 申请公布号 |
US3021131(A) |
申请公布日期 |
1962.02.13 |
| 申请号 |
US19570666963 |
申请日期 |
1957.06.20 |
| 申请人 |
LIFTRON CORP. |
发明人 |
BORNEMANN WILLIAM C. |
| 分类号 |
E05F15/16 |
主分类号 |
E05F15/16 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
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