Add-on bar-code reading apparatus in a bar-code reader

Apparatus for inspecting print quality of barcodes on a high...

Apparatus for processing human-readable and machine-readable doc

Apparatus for reading a line marking

Apparatus for reproducing data from a track whose track number c

bar code reader signal processing method and device

Bar code scanner and method

Card validator

Data reader

Delivery of item specific audible information via voice server

Delivery of item specific audible information via voice server

Device for the recognition and progressive cancellation of infor

Differentiating and integrating circuit for translating bar code

Document verification system

Dynamically variable machine readable binary code and method for

Encoded symbol reader with image reversal function

Fraud prevention arrangement

Information memory apparatus for reading out information from a

Manual scanning apparatus for reading an optical code representi

Mark sense detector with variable threshold