Process of making hydraulic products from anhydrite,申请号US19290350031-传众专利搜索

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发明名称	Process of making hydraulic products from anhydrite
摘要
申请公布号	US1821961(A)	申请公布日期	1931.09.08
申请号	US19290350031	申请日期	1929.03.26
申请人	BUTLER JOHN E	发明人	BUTLER JOHN E.
分类号	C04B11/05	主分类号	C04B11/05
代理机构		代理人
主权项
地址

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