Keyboard,申请号US19500192581-传众专利搜索

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发明名称	Keyboard
摘要
申请公布号	US2717121(A)	申请公布日期	1955.09.06
申请号	US19500192581	申请日期	1950.10.27
申请人	INTERNATIONAL BUSINESS MACHINES CORPORATION	发明人	LUHN HANS P.
分类号	G06C7/02	主分类号	G06C7/02
代理机构		代理人
主权项
地址

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