| US3293604A
              (en)
            
            * | 1963-01-25 | 1966-12-20 | Rca Corp | Character recognition system utilizing asynchronous zoning of characters | 
        
          | GB1078783A
              (en)
            
            * | 1963-03-04 | 1967-08-09 | Crosfield Electronics Ltd | Improvements in or relating to character reading | 
        
          | US3278900A
              (en)
            
            * | 1963-04-01 | 1966-10-11 | Ibm | Character recognition system employing pulse time interval measurement | 
        
          | FR1375037A
              (fr)
            
            * | 1963-05-30 | 1964-10-16 | Bull Sa Machines | Perfectionnements aux systèmes de reconnaissance de caractères imprimés | 
        
          | DE1233632B
              (de)
            
            * | 1963-12-05 | 1967-02-02 | Telefunken Patent | Einrichtung zur maschinellen Erkennung von Zeichen mit Kantenabstands-Kodierung | 
        
          | DE1264119B
              (de)
            
            * | 1963-12-05 | 1968-03-21 | Telefunken Patent | Einrichtung zur maschinellen Erkennung von Zeichen mit Kantenabstands-Kodierung | 
        
          | US3320588A
              (en)
            
            * | 1963-12-30 | 1967-05-16 | Sperry Rand Corp | Character reader | 
        
          | US3458688A
              (en)
            
            * | 1965-08-09 | 1969-07-29 | Ibm | Document line position identification for line marking and document indexing apparatus | 
        
          | US3539989A
              (en)
            
            * | 1966-05-31 | 1970-11-10 | Gen Electric | Symbol reading system | 
        
          | US3548374A
              (en)
            
            * | 1966-08-30 | 1970-12-15 | Columbia Ribbon Carbon Mfg | Character recognition system | 
        
          | US3548377A
              (en)
            
            * | 1966-10-06 | 1970-12-15 | Columbia Research Corp | Automatic character reading system | 
        
          | US3617707A
              (en)
            
            * | 1967-08-17 | 1971-11-02 | Westinghouse Air Brake Co | Automatic car identification system | 
        
          | GB1270012A
              (en)
            
            * | 1968-07-18 | 1972-04-12 | Plessey Co Ltd | Improvements in or relating to optical character recognition systems | 
        
          | US3538500A
              (en)
            
            * | 1968-12-12 | 1970-11-03 | Gen Electric | Symbol reading system | 
        
          | US3688955A
              (en)
            
            * | 1969-11-24 | 1972-09-05 | Automatisme Cie Gle | Character-reading apparatus incorporating electronic scanning circuitry | 
        
          | US3744026A
              (en)
            
            * | 1970-06-10 | 1973-07-03 | Identicon Corp | Optical label scanning | 
        
          | US3731064A
              (en)
            
            * | 1970-07-28 | 1973-05-01 | Pitney Bowes Alpex | Data processing system and reader therefor | 
        
          | US3743819A
              (en)
            
            * | 1970-12-31 | 1973-07-03 | Computer Identics Corp | Label reading system | 
        
          | US3778597A
              (en)
            
            * | 1971-01-08 | 1973-12-11 | Monarch Marking Systems Inc | Record reading system | 
        
          | US3701097A
              (en)
            
            * | 1971-01-20 | 1972-10-24 | Identicon Corp | Decoding bar patterns | 
        
          | US3761687A
              (en)
            
            * | 1972-01-03 | 1973-09-25 | Dennison Mfg Co | Dual ticket reader | 
        
          | US3991299A
              (en)
            
            * | 1972-02-03 | 1976-11-09 | Norand Corporation | Bar code scanner | 
        
          | DE2208309C3
              (de)
            
            * | 1972-02-22 | 1975-09-18 | Nixdorf Computer Ag, 4790 Paderborn | Verfahren zur Auswertung von Informationen in Form gruppenweise zusammengefaßter Informationselemente aus einfarbig gedruckten Strichen, Anordnung zur Darstellung von Informationen zur Auswertung nach dem Verfahren und Schaltungsanordnung zur Durchführung des Verfahrens | 
        
          | US3752963A
              (en)
            
            * | 1972-04-12 | 1973-08-14 | Monarch Marking Systems Inc | Method of and apparatus for interpreting a coded record | 
        
          | US3849632A
              (en)
            
            * | 1972-06-19 | 1974-11-19 | Pitney Bowes Inc | Reading apparatus for optical bar codes | 
        
          | US3890597A
              (en)
            
            * | 1973-09-17 | 1975-06-17 | Taplin Business Machines | Bar geometry verification system for bar-coded characters | 
        
          | US3932840A
              (en)
            
            * | 1973-10-15 | 1976-01-13 | Taplin Business Machines Incorporated | Error detection and sequence maintaining system for bar-code readers | 
        
          | US4053737A
              (en)
            
            * | 1976-06-25 | 1977-10-11 | Recognition Equipment Incorporated | Magnetic reader for bar encoded characters | 
        
          | FR2402252A1
              (fr)
            
            * | 1977-08-30 | 1979-03-30 | Cii Honeywell Bull | Dispositif de lecture de caracteres imprimes | 
        
          | FR2413726A1
              (fr)
            
            * | 1977-12-30 | 1979-07-27 | Cii Hb | Procede et dispositif de lecture d'une information codee sous forme d'intervalles de grandeurs predeterminees | 
        
          | FR2439433A1
              (fr)
            
            * | 1978-10-19 | 1980-05-16 | Cii Honeywell Bull | Systeme de lecture de caracteres | 
        
          | FR2442549A1
              (fr)
            
            * | 1978-11-22 | 1980-06-20 | Cii Honeywell Bull | Procede et dispositif pour l'elaboration et le traitement de deux trains d'impulsions distincts portant des informations | 
        
          | JPS62111367A
              (ja)
            
            * | 1985-11-11 | 1987-05-22 | Hitachi Ltd | バ−コ−ド読取機 | 
        
          | US5136145A
              (en)
            
            * | 1987-11-23 | 1992-08-04 | Karney James L | Symbol reader | 
        
          | US5052044A
              (en)
            
            * | 1990-02-02 | 1991-09-24 | Eastman Kodak Company | Correlated masking process for deskewing, filtering and recognition of vertically segmented characters | 
        
          | US5128528A
              (en)
            
            * | 1990-10-15 | 1992-07-07 | Dittler Brothers, Inc. | Matrix encoding devices and methods | 
        
          | CA2049866C
              (en)
            
            * | 1990-12-28 | 1998-06-30 | Raymond L. Higgins | System and method for optical recognition of bar-coded characters | 
        
          | US7900847B2
              (en)
            
            * | 2007-01-18 | 2011-03-08 | Target Brands, Inc. | Barcodes with graphical elements |