Perfectionnement apporté aux règles à calcul,申请号FRD909919-传众专利搜索

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发明名称	Perfectionnement apporté aux règles à calcul
摘要
申请公布号	FR909919(A)	申请公布日期	1946.05.22
申请号	FRD909919	申请日期	1945.03.22
申请人		发明人	DUDIN RAYMOND-LUCIEN
分类号	G06G1/12	主分类号	G06G1/12
代理机构		代理人
主权项
地址

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