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1. 发明授权

US5231570A Credit verification system 失效
标题翻译：信用验证系统
公开(公告)号：US5231570A
公开(公告)日：1993-07-27
申请号：US625477
申请日：1990-12-11
申请人： Gerritt S. K. Lee
发明人： Gerritt S. K. Lee
IPC分类号： G06Q20/24 , G06Q20/40 , G07F7/08
CPC分类号： G06Q20/4037 , G06Q20/24 , G06Q40/025 , G07F7/08
摘要： A credit card status verification system is disclosed in which the status of very large numbers of credit cards is contained and accessed from a compact storage media, such as a CD-ROM disk, at a remote location, thereby eliminating the necessity of obtaining the status information from a centrally located facility via a communication link. A data mapping algorithm is employed to map credit card numbers to status containing locations within memory without requiring large amounts of memory space for addressing. A multiple level screening process is employed for checking the validity of a credit card number and the credit status of a credit card which is both quick and economical.
摘要翻译：公开了一种信用卡状态验证系统，其中非常大量的信用卡的状态从远程位置的诸如CD-ROM盘之类的紧凑型存储介质容纳和访问，从而消除了获得状态的必要性来自中心位置的设施通过通信链路的信息。采用数据映射算法将信用卡号映射到包含存储器内的位置的状态，而不需要大量的存储器空间进行寻址。采用多层次筛选过程，检查信用卡号码的有效性和信用卡的信用状况，既快捷又经济。

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