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发明名称
Roofing and siding element and method of producing contrasting effects thereon
摘要
申请公布号
US1969074(A)
申请公布日期
1934.08.07
申请号
US19300443602
申请日期
1930.04.11
申请人
BAKELITE BUILDING PRODUCTS CO. INC.
发明人
HARSHBERGER NORMAN P.
分类号
E04D1/26
主分类号
E04D1/26
代理机构
代理人
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