Symbol Technologies, LLC

Gary Serbin

Jerome Swartz

Ron Goldman

Miklos Stern

Thomas K Roslak

Jay Paul White

Anthony R Barkume

Stephen Jay Shellhammer

David P Goren

Harry E Kuchenbrod

Edward D Barkan

Glenn S Spitz

Donna Pandolfo

Jane Chan

Guy Cipriani

A system for transferring data between a centrally located site and a portable communications terminal via a telephone network, the site having associated therewith a look up table containing- plurality of data records correlating to items disposed at a retail establishment, wherein each of the items has associated therewith a bar code encoded with the indicia unique to each item, with each of the bar coded indicia corresponding to a particular record in the table, the data containing at least a portion of said record.

Cellular telephone for acquiring data encoded in bar code indicia

A system for transferring data between a centrally located site and a portable communications terminal via a telephone network, the site having associated therewith a look up table containing-plurality of data records correlating to items disposed at a retail establishment, wherein each of the items has associated therewith a bar code encoded with the indicia unique to each item, with each of the bar coded indicia corresponding to a particular record in the table, the data containing at least a portion of said record.

Wireless telephone for acquiring data encoded in bar code indicia

A system for transferring data between a centrally located site and a portable communications terminal via a telephone network, the site having associated therewith a look up table containing plurality of data records correlating to items disposed at a retail establishment, wherein each of the items has associated therewith a bar code encoded with the indicia unique to each item, with each of the bar coded indicia corresponding to a particular record in the table, the data containing at least a portion of said record.

Self-service checkout system utilizing portable communications terminal

A multi-bit digitizer (30) for a barcode reader detects the presence of edges of a scanned barcode symbol, and also measures the strength of each detected edge. A polarity or edge direction signal (8) indicates the direction of each detected edge, and a timing signal (6) is representative of the timing and also, by means of a variable pulse width, the strength of each edge. A gating signal (200) indicates that the data are unreliable and invalid if the measured voltage applied to the scanner motor of the barcode reader is higher or lower than defined limit values. Any scans made at a speed which were too high or too low are rejected.

Interface between threshold processing digitizer for bar code reader

Self-service checkout system utilizing portable self-checkout

An optical scanning system is provided for producing a signal representative of a spatial distribution of indicia having different degrees of reflectivity to light, such as a bar code. The system includes an optical scanner for scanning beam of light over the spatial distribution of indicia and for producing an electrical signal corresponding to changes in the degree of reflectivity of the indicia. A digitizer, responsive to detections in a predetermined characteristic of the produced electrical signal is provided. The digitizer converts the detections into digital words, such digital signals having a plurality of bits. The digitizer includes a timing generation circuit for producing a pulse in response to each one of the detections with a time duration representative of the degree of reflectivity of the indicia as the beam of light. A decoder converts the time duration of the pulse into the digital word having a plurality of bits. An enhancement filter is also disclosed. The enhancement filter modifies pulses produced by a differentiator circuit used in the scanner. Such modification includes increasing the rise time, and peak level of, the pulses produced by the differentiator circuit 24.

Optical scanners and signal processors therefor

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Bellmore, NY, United States of America

Gary Serbin