Calculator,申请号US19350013173-传众专利搜索

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发明名称	Calculator
摘要
申请公布号	US2118773(A)	申请公布日期	1938.05.24
申请号	US19350013173	申请日期	1935.03.26
申请人	BALL ROBERT P	发明人	BALL ROBERT P.
分类号	G06G1/00	主分类号	G06G1/00
代理机构		代理人
主权项
地址

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