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GB2065562A
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Solid character printer
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US4066998A
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Method and apparatus for discriminating between characters in character recognition systems
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US3944977A
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Adaptive and programmed threshold level detection arrangement
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GB1454813A
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Method and apparatus for recognising handwritten characters in an optical character recognition machine
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CH581867A5
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Character reader scanning system - uses line of light whose length corresponds to max. length of characters and of given width
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IE38315B1
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Improved optical scan arrangement for optical character recognition
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US3848228A
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Visual display of unrecognizable characters in optical character recognition machines
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US3872433A
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Optical character recognition system
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US3812459A
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Opticscan arrangement for optical character recognition systems
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