Bituminous ditch liner,申请号US19330694838-传众专利搜索

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发明名称	Bituminous ditch liner
摘要
申请公布号	US1981788(A)	申请公布日期	1934.11.20
申请号	US19330694838	申请日期	1933.10.23
申请人	GARDNER DAVID I	发明人	GARDNER DAVID I.
分类号	E01C19/25;E02B5/02	主分类号	E01C19/25
代理机构		代理人
主权项
地址

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