Production of helical springs having face-ground ends,申请号US19540404296-传众专利搜索

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发明名称	Production of helical springs having face-ground ends
摘要
申请公布号	US2810993(A)	申请公布日期	1957.10.29
申请号	US19540404296	申请日期	1954.01.15
申请人	EMIL SCHENKER A. G.	发明人	STEGMANN ERNST
分类号	B21F11/00;B21F35/00;B24B7/16	主分类号	B21F11/00
代理机构		代理人
主权项
地址

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