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发明名称
Composition roof covering
摘要
申请公布号
US2273220(A)
申请公布日期
1942.02.17
申请号
US19400357077
申请日期
1940.09.17
申请人
BARBER ASPHALT CORPORATION
发明人
RITTER ALEXANDER
分类号
E04D1/22
主分类号
E04D1/22
代理机构
代理人
主权项
地址
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