05420409 is referenced by 300 patents and cites 9 patents.

A method is disclosed for the reading graphical indicia that are encoded in accordance with a multidimensional symbology. The indicia are repeatedly scanning a signal representative of a pattern thereof until sufficient information is recognized to assure a valid reading operation. The signal, or a memorized representation thereof is decoded to obtain character information from code words of the indicia. A first value is assigned to each newly recognized character, and a second value is assigned to each character that was recognized in a preceding scan of the indicia. The first and second values are respectively cumulated into first and second sums. A function of the first sum and the second sum is computed, an audible click produced whenever a predetermined value of the function has been attained. The first and second sums are then reset. The rate of clicks informs the user of the progression of the reading operation. An auxiliary audible indicator, such as pitch, can be varied to inform the user of the cumulative progress of the scan.

Title
Bar code scanner providing aural feedback
Application Number
8/137640
Publication Number
5420409
Application Date
October 18, 1993
Publication Date
May 30, 1995
Inventor
Robert M Hussey
Syracuse
NY, US
Andrew Longacre Jr
Skaneateles
NY, US
Agent
Harris Beach & Wilcox
Assignee
Welch Allyn
NY, US
IPC
G06K 19/06
G06K 7/00
G06K 7/10
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