Bar codes and methods

摘要: Improvements in product and production codes methods for reading same. In one form a bar code is provided wherein or more of the individual bars are printed otherwise formed with coded information recorded therein. The may be made matter either divided into defining segments voids therein readable auxiliary information. another form, magnetic recording material containing recordings read when scanned their without scanning code. Reading by path paths extending normal oblique to direction parallel longitudinally along substantial additional information, if needed.