| 发明名称 |
Crossing gate |
| 摘要 |
|
| 申请公布号 |
US1948512(A) |
申请公布日期 |
1934.02.27 |
| 申请号 |
US19330654328 |
申请日期 |
1933.01.30 |
| 申请人 |
EVERETT DANIEL |
发明人 |
DANIEL EVERETT |
| 分类号 |
B61L29/20 |
主分类号 |
B61L29/20 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
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