Process of making thick butt shingles,申请号US19310577193-传众专利搜索

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发明名称	Process of making thick butt shingles
摘要
申请公布号	US2074684(A)	申请公布日期	1937.03.23
申请号	US19310577193	申请日期	1931.11.25
申请人	THE BARRETT COMPANY	发明人	ECKERT CLARENCE R.
分类号		主分类号
代理机构		代理人
主权项
地址

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