Apparatus for computing and indicating the ratio of variable quantities,申请号US19310540734-传众专利搜索

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发明名称	Apparatus for computing and indicating the ratio of variable quantities
摘要
申请公布号	US1922957(A)	申请公布日期	1933.08.15
申请号	US19310540734	申请日期	1931.05.28
申请人	ALFRED JULIUS GEORGE;FRANCIS JULIUS AWDRY	发明人	JULIUS GEORGE ALFRED;JULIUS AWDRY FRANCIS
分类号	G06G3/00	主分类号	G06G3/00
代理机构		代理人
主权项
地址

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