Method and apparatus for making roofing materials,申请号US19290402624-传众专利搜索

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发明名称	Method and apparatus for making roofing materials
摘要
申请公布号	US1794674(A)	申请公布日期	1931.03.03
申请号	US19290402624	申请日期	1929.10.26
申请人	ANACONDA SALES COMPANY	发明人	CUMFER DONALD A.
分类号	D21J1/16	主分类号	D21J1/16
代理机构		代理人
主权项
地址

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