Top form for concrete conduits,申请号US19570700486-传众专利搜索

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发明名称	Top form for concrete conduits
摘要
申请公布号	US2896301(A)	申请公布日期	1959.07.28
申请号	US19570700486	申请日期	1957.12.03
申请人	BARRON CURTIS L	发明人	BARRON CURTIS L.
分类号	B28B21/88;F16L1/038	主分类号	B28B21/88
代理机构		代理人
主权项
地址

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