Roger Herman Colburn

US Patent:

6446868, Sep 10, 2002

Filed:

Nov 23, 1998

Appl. No.:

09/198125

Inventors:

Brent G. Robertson - Richardson TX
Glenn W. Lee - Plano TX
Roger J. Colburn - Plano TX

Assignee:

Informatics, Inc. - Plano TX

International Classification:

G06K 710

US Classification:

2354621, 23546216, 23546211

Abstract:

A method and apparatus for decoding two-dimensional barcode symbols from a data stream generated by scanning a two-dimensional barcode with a one-dimensional scanner. A decoding process according to one embodiment of the invention involves coupling the one-dimensional scanner to a serial or other port of a host computer in order to provide a data stream to a software decoder resident in the host computer. The software decoder performs a series of iterative steps in which the data stream is sampled at regular intervals to convert the data stream to a series of elements (e. g. , bars and spaces). Barcode symbol data characters are then derived from the elements. A symbol matrix is next constructed, the matrix being representative of the two-dimensional barcode symbol.

US Patent:

6263383, Jul 17, 2001

Filed:

Nov 23, 1998

Appl. No.:

9/198127

Inventors:

Glenn W. Lee - Plano TX
Brent G. Robertson - Richardson TX
Roger J. Colburn - Plano TX

International Classification:

G06F 1300
G06F 600
H04N 7173

US Classification:

710 38

Abstract:

A method and apparatus for processing data in a computer system from a keyboard wedged device and a keyboard hook device. The keyboard wedge converts the data into standard keyboard keystrokes for transmission over a keyboard line. The keyboard hook provides a window through which scanned data is detected. Scanned data is distinguished from typed data using a software data processing application. The software is configured to identify scanned data based on characteristics of the scanned data. Processing functions are next performed on the detected data according to the particular application being used.