1
Mark Correa, Rubin Gelles, Duanfeng He, Eugene Joseph, Yajun Li, Mehul Patel, Thomas M Stankelis: Imaging engine and method for code readers. Symbol Technologies, Burns Doane Swecker & Mathis L, January 22, 2002: US06340114 (342 worldwide citation)

An imaging engine and signal processing devices and methods are disclosed for reading various kinds of optical codes. The compact structure may include a two dimensional image sensor, apparatus for focusing images at different focal disclosures, an aiming system, a hi-low beam illumination system an ...


2
Jerome Swartz, Yajun Li, Paul Dvorkis, Glenn Spitz: Method and apparatus for reading two-dimensional bar code symbols with an elongated laser line. Symbol Technologies, Fish & Richardson P C, April 15, 1997: US05621203 (273 worldwide citation)

A plurality of the areas of different light reflectivity of a bar code symbol, or the like, are simultaneously illuminated, using, e.g., a beam of laser light that has an elongated cross-section. The laser light beam is swept over the symbol in a direction transverse to the elongated dimension of th ...


3
Eugene Joseph, Yajun Li, Duanfeng He, Joseph Katz, Jerome Swartz: Bar code reader for reading both one dimensional and two dimensional symbologies with programmable resolution. Symbol Technologies, Kirschstein et al, January 20, 1998: US05710417 (271 worldwide citation)

A plurality of the areas of differing light reflectivity of a bar code symbol or the like are simultaneously illuminated using, for example, a beam of light that has an elongate cross-section. The light beam is swept over the symbol to be read in a direction transverse to the elongated dimension of ...


4
Yajun Li, Joseph Katz, Jerome Swartz, Edward Barkan: Apparatus and method for reading indicia using charge coupled device and scanning laser beam technology. Symbol Technologies, Kirschtein et al, June 4, 2002: US06398112 (269 worldwide citation)

A scanning device for reading indicia of differing light reflectivity, including bar code or matrix array symbols, has a single light emitter, such as a laser or light emitting diode, for generating a scanning light beam to visually illuminate sequential portions of the indicia. A sensor, such as a ...


5
Yajun Li, Robert A Doran, John Barile: Multiple laser indicia reader optionally utilizing a charge coupled device (CCD) detector and operating method therefor. Symbol Technologies, Fish & Richardson P C, February 10, 1998: US05717221 (166 worldwide citation)

An electro-optical scanning device reads indicia having parts of different light reflectivity, including bar codes and matrix arrays such as UPSCODES. The scanning device includes laser or light emitting diodes for emitting at least two light beams of the same or different wavelengths. The light bea ...


6
Yajun Li, Joseph Katz, Jerome Swartz, Daniel McGlynn: Apparatus and method for reading indicia using charge coupled device and scanning laser beam technology. Symbol Technologies, September 30, 1997: US05672858 (109 worldwide citation)

A scanning device for reading indicia of differing light reflectivity, including bar code or matrix array symbols, has a single light emitter, such as a laser or light emitting diode, for generating a scanning light beam to visually illuminate sequential portions of the indicia. A sensor, such as a ...


7
Raj Bridgelall, Joseph Katz, David P Goren, Paul Dvorkis, Yajun Li: Laser scanning system and scanning method for reading 1-D and 2-D barcode symbols. Symbol Technologies, Lowe Price LeBlanc & Becker, April 2, 1996: US05504316 (102 worldwide citation)

Optical scanning of one- and two-dimensional barcode symbols is carried out first in an aim mode wherein the symbol is scanned using a first scan pattern that is relatively small and dense so as to be visible to the user and thereafter using a second, larger and more robust scan pattern for decoding ...


8
Yajun Li, Joseph Katz, Jerome Swartz, Daniel McGlynn, Edward Barkan: Apparatus and method for determining a distance to a target. Symbol Technologies, Finnegan Henderson Farabow Garrett & Dunner L, September 26, 2000: US06123264 (91 worldwide citation)

A range finder for use with a bar code scanner. An image of a scan line is detected by a sensor array. Distance from the scanner to the bar code symbol is determined from the length of the detected scan line image.


9
Edward Barkan, David P Goren, Joseph Katz, Yajun Li, Jerome Swartz, Thomas Mazz: Multi-resolution bar code reader. Symbol Technologies, January 11, 1994: US05278397 (82 worldwide citation)

The method and apparatus of this invention facilitate operation of a bar code reader over a wider range of working angle and for a wider range of bar code densities. The invention includes improved optics and sensing elements. The optics and sensing elements and/or the associated circuitry are arran ...


10
Howard Shepard, Edward D Barkan, Paul Dvorkis, Boris Metlitsky, Raj Bridgelall, Vladimir Gurevich, Mark Krichever, Yajun Li, Joseph Katz, Vincent Luciano: Retro-reflective scan module for electro-optical readers. Symbol Technologies, Kirschstein et al, March 26, 2002: US06360949 (82 worldwide citation)

A miniaturized electro-optical, retro-reflective scanning module. The module has a base, a first circuit board, and a second circuit board mounted substantially orthogonal to the first circuit board. The base supports a light emitter for producing a scanning beam and optical elements for directing a ...