Semipermanent mold and method of making the same,申请号US19290387310-传众专利搜索

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发明名称	Semipermanent mold and method of making the same
摘要
申请公布号	US1871422(A)	申请公布日期	1932.08.09
申请号	US19290387310	申请日期	1929.08.21
申请人	ALUMINUM COMPANY OF AMERICA	发明人	NORTON ALLEN B.
分类号	B22C21/00	主分类号	B22C21/00
代理机构		代理人
主权项
地址

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