A letter code check calculator,申请号GB19390032969-传众专利搜索

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发明名称	A letter code check calculator
摘要
申请公布号	GB534118(A)	申请公布日期	1941.02.27
申请号	GB19390032969	申请日期	1939.12.28
申请人	GEORGE NORMAN BROCKHURST	发明人
分类号	G09C1/04	主分类号	G09C1/04
代理机构		代理人
主权项
地址

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