Structural form of slide rules,申请号US19490074738-传众专利搜索

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发明名称	Structural form of slide rules
摘要
申请公布号	US2615630(A)	申请公布日期	1952.10.28
申请号	US19490074738	申请日期	1949.02.05
申请人	FREDERICK ECKEL ARTHUR	发明人	ECKEL ARTHUR FREDERICK
分类号	G06G1/04	主分类号	G06G1/04
代理机构		代理人
主权项
地址

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