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Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky, Sankar Ghosh, Michael Schnee, Pasqual Spatafore, Thomas Amundsen, Sung Byun, Mark Schmidt, Garrett Russell, John Bonanno, C Harry Knowles: Hand-supportable digital imaging-based bar code symbol reader supporting narrow-area and wide-area modes of illumination and image capture. Metrologic Instruments, Thomas J Perkowski Esq P C, October 31, 2006: US07128266 (247 worldwide citation)

A hand-supportable digital imaging-based bar code symbol reading device comprises: an ir-based object presence and range detection subsystem; a multi-mode area-type image formation and detection subsystem having narrow-area and wide area image capture modes of operation; a multi-mode LED-based illum ...


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Mark Schmidt: Intermediate rate applications of punctured convolutional codes for 8PSK trellis modulation over satellite channels. General Instrument Corporation, Barry R Lipsitz, June 1, 1999: US05909454 (52 worldwide citation)

A method and apparatus are provided for convolutionally encoding digital data with a rate 5/8 convolutional code. A standard rate 1/2 convolutional code is punctured to rate 5/8 using a puncture map of ##EQU1## and octal generators 133, 171 wherein the constraint length K=7. An incoming data stream ...


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Mark Schmidt, Garrett K Russell, C Harry Knowles, Xiaoxun Zhu, Ka Man Au, Congwei Xu, Liang Liu, Kai Ji, Wuqing Zhang: Wireless bar code symbol driven portable data terminal (PDT) system adapted for single handed operation. Metrologic Instruments, Thomas J Perkowski Esq P C, December 20, 2005: US06976626 (50 worldwide citation)

The wireless PDT of the present invention employs a “display-on bottom” design which places the unit perfectly centered in the hand of the operator, allowing for the best possible viewing as well as providing comfortable single-handed operation. The high-resolution LCD display allows the PCT to show ...


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David M Wilz Sr, George Rockstein, Robert E Blake, Mark Schmidt, Garrett Russell, C Harry Knowles: Automatically-activated hand-supportable laser scanning bar code symbol reading system with data transmission activation switch. Metrologic Instruments, Thomas J Perkowski Esq P C, September 4, 2001: US06283375 (43 worldwide citation)

Disclosed is an automatically-activated code symbol reading system comprising a bar code symbol reading mechanism contained within a handsupportable housing having a manually-actuatable data transmission switch. During symbol reading operations, the bar code symbol reading mechanism automatically ge ...


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Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky, Sankar Ghosh, Michael Schnee, Pasqual Spatafore, Thomas Amundsen, Sung Byun, Mark Schmidt, Garrett Russell, John Bonanno, C Harry Knowles: METHOD OF AND APPARATUS FOR PROCESSING CAPTURED DIGITAL IMAGES OF OBJECTS WITHIN A SEMI-AUTOMATIC HAND-SUPPORTABLE IMAGING-BASED BAR CODE SYMBOL READER SO AS TO READ 1D AND/OR 2D BAR CODE SYMBOLS GRAPHICALLY REPRESENTED THEREIN. Metrologic Instruments, Thomas J Perkowski Esq P C, August 8, 2006: US07086595 (42 worldwide citation)

Method of and apparatus for processing captured images within a semi-automatic hand-supportable imaging-based bar code symbol reader in order to read 1D and/or 2D bar code symbols graphically represented therein. The semi-automatic hand-supportable digital imaging-based bar code symbol reader compri ...


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Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky, Sankar Ghosh, Michael Schnee, Pasqual Spatafore, Thomas Amundsen, Sung Byun, Mark Schmidt, Garrett Russell, John Bonanno, C Harry Knowles: Hand-supportable digital imaging-based bar codes symbol reader employing multi-mode subsystems. Metrologic Instruments, Thomas J Perkowski Esq P C, March 6, 2007: US07185817 (37 worldwide citation)

A hand-supportable Digital Imaging-Based Bar Code Symbol Reading Device comprises: an IR-based Object Presence and Range Detection Subsystem; a Multi-Mode Area-type Image Formation and Detection Subsystem having narrow-area and wide area image capture modes of operation; a Multi-Mode LED-based Illum ...


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Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky, Sankar Ghosh, Michael Schnee, Pasqual Spatafore, Thomas Amundsen, Sung Byun, Mark Schmidt, Garrett Russell, John Bonanno, C Harry Knowles: Method of reading code symbols using a hand-supportable digital image capturing and processing device employing a micro-computing platform supporting an event-driven multi-tier modular software architecture. Metrologic Instruments, Thomas J Perkowski Esq P C, February 17, 2009: US07490778 (32 worldwide citation)

A portable digital image capturing and processing system comprising: an image formation and detection subsystem; a narrow-band illumination subsystem; a narrow-band transmission-type optical filter subsystem; an automatic light exposure measurement subsystem; and an automatic illumination control su ...


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David M Wilz Sr, George Rockstein, Robert E Blake, Mark Schmidt, Garrett Russell, C Harry Knowles: Portable hand-supportable data terminal with automatically-activated laser scanning bar code symbol reader integrated therein. Metrologic Instruments, Thomas J Perkowski Esq P C, August 10, 2004: US06772949 (32 worldwide citation)

A portable hand-supportable data terminal for allowing an operator to enter, collect, and display data. The data terminal comprises a hand-supportable housing having a light transmission aperture and an automatically-activated laser scanning bar code symbol reading subsystem integrated therewithin. ...


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