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发明名称
IMPROVED SECURITY DATA ENTRY ALPHANUMERIC KEYPAD
摘要
申请公布号
CA2214190(A1)
申请公布日期
1999.04.15
申请号
CA19972214190
申请日期
1997.10.15
申请人
BLOM, MICHAEL ERNEST
发明人
BLOM, MICHAEL ERNEST
分类号
G06F1/00;G06F3/02;G06F3/023;G06F21/00;G07F7/10;(IPC1-7):G06F3/023;H03M11/00
主分类号
G06F1/00
代理机构
代理人
主权项
地址
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