Device for protecting concrete,申请号US19330701782-传众专利搜索

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发明名称	Device for protecting concrete
摘要
申请公布号	US2031098(A)	申请公布日期	1936.02.18
申请号	US19330701782	申请日期	1933.12.11
申请人	CERF SAM P;CERF ERVIN W	发明人	CERF SAM P.;CERF ERVIN W.
分类号	B28B11/24;E01C23/03	主分类号	B28B11/24
代理机构		代理人
主权项
地址

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