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1. 发明授权

US4899381A Single-line telephone hold circuit 失效
标题翻译：单线电话保持电路
公开(公告)号：US4899381A
公开(公告)日：1990-02-06
申请号：US334623
申请日：1989-04-07
申请人： Gerritt S. K. Lee
发明人： Gerritt S. K. Lee
IPC分类号： H04M1/80 , H04M3/428
CPC分类号： H04M3/4283 , H04M1/80
摘要： A pair of interface devices, mounted externally to a pair of residential telephones, can place a temporary hold on the associated telephone line circuit. Each interface device interconnects a standard residential telephone with an associated telephone line circuit. In a two telephone arrangement to place the telephone circuit in a hold condition, the user throws a switch mounted on the interface device, and hangs up the handset (goes on hook). The switch places two indicator lamps across the two-wire line circuit to simulate an off-hook condition. To remove the hold condition, the user merely throws the same switch or the switch associated with one of the other phones in the residence. There is no need to return to the original phone first used to establish the hold.
摘要翻译：一对外部连接到一对住宅电话的接口设备可以临时保持在相关联的电话线路上。每个接口设备将标准住宅电话与相关联的电话线电路互连。在将电话电路置于保持状态的两个电话装置中，用户投掷安装在接口装置上的开关，并挂断手机（挂机）。开关将两个指示灯放置在双线线路上，以模拟摘机状态。为了消除保持状态，用户只需将相同的开关或与住宅中其他电话之一相关联的开关投入使用。没有必要返回原来的手机首先用来建立持有。

2. 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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