Perforated record card,申请号US19300426581-传众专利搜索

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发明名称	Perforated record card
摘要
申请公布号	US1928209(A)	申请公布日期	1933.09.26
申请号	US19300426581	申请日期	1930.02.07
申请人	INTERNATIONAL BUSINESS MACHINES CORPORATION	发明人	MILLS ALBERT W.
分类号	B67D7/16;G06K19/04	主分类号	B67D7/16
代理机构		代理人
主权项
地址

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