Process of making concrete,申请号US19290347737-传众专利搜索

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发明名称	Process of making concrete
摘要
申请公布号	US1903976(A)	申请公布日期	1933.04.18
申请号	US19290347737	申请日期	1929.03.16
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	BURNS ROBERT M.
分类号	C04B28/02	主分类号	C04B28/02
代理机构		代理人
主权项
地址

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