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发明名称
KEY-ENTRY SYSTEM
摘要
申请公布号
US3602897(A)
申请公布日期
1971.08.31
申请号
USD3602897
申请日期
1969.07.03
申请人
INTERNATIONAL BUSINESS MACHINES CORP.
发明人
JOHN J. IGEL;MYRON D. SCHETTL
分类号
G06F3/02;G06K1/06;G06K5/00;G11C21/00;(IPC1-7):G06F11/00;G06F11/10
主分类号
G06F3/02
代理机构
代理人
主权项
地址
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