Worm generating hob,申请号US19270215970-传众专利搜索

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发明名称	Worm generating hob
摘要
申请公布号	US1765853(A)	申请公布日期	1930.06.24
申请号	US19270215970	申请日期	1927.08.27
申请人	THE NATIONAL TOOL COMPANY	发明人	SIMMONS OLIVER G.
分类号	B23F21/16	主分类号	B23F21/16
代理机构		代理人
主权项
地址

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