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发明名称
ROOFING SHINGLE
摘要
申请公布号
CA419950(A)
申请公布日期
1944.05.02
申请号
CAD419950
申请日期
申请人
CANADIAN GYPSUM COMPANY LIMITED;UNITED STATES GYPSUM COMPANY
发明人
DON B. HUMPHREY
分类号
主分类号
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代理人
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