Expansible molding core,申请号US19490080478-传众专利搜索

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发明名称	Expansible molding core
摘要
申请公布号	US2612673(A)	申请公布日期	1952.10.07
申请号	US19490080478	申请日期	1949.03.09
申请人	VACUUM CONCRETE, INC.	发明人	BILLNER KARL P.
分类号	B28B21/20;E04G11/04;E21D11/10;F16L1/038	主分类号	B28B21/20
代理机构		代理人
主权项
地址

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