| 发明名称 |
Adjustable sign |
| 摘要 |
|
| 申请公布号 |
US2888763(A) |
申请公布日期 |
1959.06.02 |
| 申请号 |
US19570656922 |
申请日期 |
1957.05.03 |
| 申请人 |
ROYCROFT JR WILLIAM J |
发明人 |
JR. WILLIAM J. ROYCROFT, |
| 分类号 |
G09F7/20;G09F21/04 |
主分类号 |
G09F7/20 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
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