Process of manufacturing portland cement,申请号US19290364707-传众专利搜索

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发明名称	Process of manufacturing portland cement
摘要
申请公布号	US1893696(A)	申请公布日期	1933.01.10
申请号	US19290364707	申请日期	1929.05.20
申请人	PACIFIC PORTLAND CEMENT COMPANY	发明人	COLTON JAMES H.
分类号	C04B7/44	主分类号	C04B7/44
代理机构		代理人
主权项
地址

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