A method and an apparatus facilitate scanning an Add-On code portion of a bar code label to determine the bar code data printed thereon by sweeping a scanning beam in a scan path across the Add-On code portion of the label. The bar code label includes bar codes of the type which have a primary code portion...http://www.google.fr/patents/US5311000?utm_source=gb-gplus-shareBrevet US5311000 - Bar code scanner and method of scanning
