Intermittently variable feed mechanism for forming changeable lead helix,申请号US19540411928-传众专利搜索

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发明名称	Intermittently variable feed mechanism for forming changeable lead helix
摘要
申请公布号	US2796794(A)	申请公布日期	1957.06.25
申请号	US19540411928	申请日期	1954.02.23
申请人	THE GRISCOM-RUSSELL COMPANY	发明人	BRUEGGER ERNEST
分类号	B21C37/26	主分类号	B21C37/26
代理机构		代理人
主权项
地址

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