Material working apparatus,申请号US19310584169-传众专利搜索

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发明名称	Material working apparatus
摘要
申请公布号	US1977690(A)	申请公布日期	1934.10.23
申请号	US19310584169	申请日期	1931.12.31
申请人	WESTERN ELECTRIC COMPANY, INCORPORATED	发明人	NOREM BERNHARD
分类号	B21D45/00	主分类号	B21D45/00
代理机构		代理人
主权项
地址

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