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发明名称
KEYBOARD APPARATUS
摘要
申请公布号
GB1545406(A)
申请公布日期
1979.05.10
申请号
GB19770052383
申请日期
1977.12.16
申请人
IBM CORP
发明人
分类号
G06F3/023;G06F17/22;H03M11/02;H03M11/04;H03M11/22;(IPC1-7):H03K13/24
主分类号
G06F3/023
代理机构
代理人
主权项
地址
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