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经营范围
发明名称
Parking sign
摘要
申请公布号
US1788232(A)
申请公布日期
1931.01.06
申请号
US19290372883
申请日期
1929.06.22
申请人
THE EASTERN MALLEABLE IRON CO.
发明人
DAVIS THOMAS R.
分类号
G09F7/18
主分类号
G09F7/18
代理机构
代理人
主权项
地址
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