Method of making porous concrete,申请号US19480055429-传众专利搜索

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发明名称	Method of making porous concrete
摘要
申请公布号	US2534915(A)	申请公布日期	1950.12.19
申请号	US19480055429	申请日期	1948.10.19
申请人	HENRY B. WALKER, JR.	发明人	JR. BENJAMIN M. KING,
分类号	C04B28/04	主分类号	C04B28/04
代理机构		代理人
主权项
地址

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