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    • 1. 发明申请
    • Method for printing two dimensional barcodes to reduce reading errors
    • 打印二维条形码以减少阅读错误的方法
    • US20080054080A1
    • 2008-03-06
    • US11511790
    • 2006-08-29
    • Robert A. CorderyFrederick W. RyanClaude Zeller
    • Robert A. CorderyFrederick W. RyanClaude Zeller
    • G06K19/06
    • G06K19/06037
    • A method of printing modules for a two dimensional barcode that includes printing a pixel at a plurality of the pixel locations included in the inner portion of the darkened module, and printing a pixel at less than all of the pixel locations of the outer boundary of the darkened module. Various embodiments are contemplated, such as, without limitation, methods that print darkened modules having four light corners, three light corners, two light corners, one light corner, and/or one light edge. Also, a method of printing a two dimensional barcode having a finder pattern wherein the inner edge of the finder pattern is light, meaning that is does not include any printed pixels at the pixel locations along the inner edge.
    • 一种用于二维条形码打印模块的方法,包括在包含在变暗模块的内部部分的多个像素位置处打印像素,并且将像素打印在小于全部像素位置的像素位置 变暗模块 可以想到各种实施例,例如但不限于打印具有四个光角,三个光角,两个光角,一个光角和/或一个光边缘的变暗模块的方法。 此外,一种打印具有取景器图案的二维条形码的方法,其中取景器图案的内边缘是浅的,这意味着在沿着内边缘的像素位置处不包括任何印刷像素。
    • 4. 发明授权
    • Method and system for securing communications in a metering device
    • 用于确保计量装置中通信的方法和系统
    • US08208633B2
    • 2012-06-26
    • US12276523
    • 2008-11-24
    • Robert A. CorderyFrederick W. Ryan, Jr.Yassir Nawaz
    • Robert A. CorderyFrederick W. Ryan, Jr.Yassir Nawaz
    • H04L9/00
    • G06F21/608G06F21/606H04L9/0662H04L9/0869H04L9/3242
    • A method and system for securing the communication link between the accounting device and printer of a metering system by authenticating the data being sent via the link utilizing a Nonlinear Feedback Shift Register (NLFSR) based system is provided. A NLFSR is provided in each of the accounting unit and printing unit of a metering system. The NLFSR in the accounting unit is utilized to generate a message authentication code (MAC) for the image data being sent from the accounting unit to the printing unit. The printing unit generates a corresponding MAC for the received image data using the NLFSR in the printing unit. The MAC generated by the printing unit is compared with the MAC generated by the accounting unit. If the MACs are similar, the image data is accepted as authentic and the printing unit will print the image corresponding to the image data.
    • 提供了一种用于通过基于非线性反馈移位寄存器(NLFSR)的系统认证通过链路发送的数据来确保计费系统的计费装置和打印机之间的通信链路的方法和系统。 在计量系统的每个计帐单元和打印单元中都提供一个NLFSR。 会计单元中的NLFSR用于生成从计费单元发送到打印单元的图像数据的消息认证码(MAC)。 打印单元使用打印单元中的NLFSR为接收的图像数据生成相应的MAC。 由打印单元生成的MAC与由计帐单元生成的MAC进行比较。 如果MAC相似,则图像数据被接受为真实的,并且打印单元将打印与图像数据相对应的图像。